Interactivate: Activities

155 items total

Number and Operations • Geometry • Algebra • Probability • Statistics • Modeling • Discrete • Other • Show All

Number and Operations

Another Hilbert Curve Generator	Students work step-by-step through the generation of a different Hilbert-like Curve (a fractal made from deforming a line by bending it), allowing them to explore number patterns in sequences and geometric properties of fractals.
Arithmetic Four	A game like Fraction Four but instead of fraction questions the player must answer arithmetic questions (addition, subtraction, multiplication, division) to earn a piece to place on the board. Parameters: time limit, difficulty level, types of questions. Arithmetic Four is one of the Interactivate assessment games.
Arithmetic Quiz	Similar to Arithmetic Four: Arithmetic Quiz gives the user randomized questions to answer on arithmetic with whole numbers and integers. Parameters: Level of difficulty and types of questions. Arithmetic Quiz is one of the Interactivate assessment quizzes.
Bounded Fraction Finder	The same as "Bounded Fraction Pointer" but there is no arrow to help the user determine the value of the fractions between the two endpoints. Bounded Fraction Finder is one of the Interactivate assessment explorers.
Bounded Fraction Pointer	Graphically determine the value of two fractions you have chosen (which are represented as points on a number line). Graphically find a fraction whose value is between your two fractions (using an arrow on the number line as a guide), then determine its value. Bounded Fraction Pointer is one of the Interactivate assessment explorers.
Caesar Cipher	Create your own affine cipher for encoding and decoding messages. Input your own constant and multiplier, then input a message to encode.
Caesar Cipher II	Encode and decode messages to determine the form for an affine cipher. Input a message to encode, then input your guesses for the constant and multiplier. Caesar Cipher II is one of the Interactivate assessment explorers.
Caesar Cipher III	Decode encrypted messages to determine the form for an affine cipher, and practice your reasoning and arithmetic skills. Input your guesses for the multiplier and constant. Caesar Cipher III is one of the Interactivate assessment explorers.
Cantor's Comb	Learn about fractions between 0 and 1 by repeatedly deleting portions of a line segment, and also learn about properties of fractals. Parameter: fraction of the segment to be deleted each time.
Clock Arithmetic	Work with various types of clocks in order to learn about modular arithmetic operations. Parameters: Number of hours on the clock.
Coloring Multiples in Pascal's Triangle	Color numbers in Pascal's Triangle by rolling a number and then clicking on all entries that are multiples of the number rolled, thereby practicing multiplication tables, investigating number patterns, and investigating fractal patterns. Coloring Multiples in Pascal's Triangle is one of the Interactivate assessment explorers.
Coloring Remainders in Pascal's Triangle	Color numbers in Pascal's Triangle by rolling a number and then clicking on all entries that have the same remainder when divided by the number rolled, thereby practicing division and remainders, investigating number patterns, and investigating fractal patterns. Coloring Remainders in Pascal's Traingle is one of the Interactivate assessment explorers.
Comparison Estimator	Compare two sets of objects, using estimation to determine which is greater. Estimate a number of objects, the length of a line, or the area of a shape. Parameter: error tolerance. Comparison Estimator is one of the Interactivate assessment explorers.
Converter	Converts fractions to decimals and decimals to fractions. Observe the relationships between fractions and decimals.
Equivalent Fractions Finder	Visually represent two unique fractions that are equivalent to a given fraction. The fractional value is shown on a number line after you check to see if your fraction is correct. Equivalent Fraction Finder is one of the Interactivate assessment explorers.
Equivalent Fractions Pointer	Visually represent two unique fractions that are equivalent to a given fraction. The fractional value is shown on a number line as you color in the fraction. Equivalent Fraction Pointer is one of the Interactivate assessment explorers.
Estimator	Practice estimation skills by determining the number of objects, the length of a line, or the area of a shape. Parameters: error tolerance. Estimator is one of the Interactivate assessment explorers.
Estimator Four	Play a "Connect-Four" style game, earning a game piece each time you answer an estimation question correctly. This game asks the players to estimate the answer to addition, multiplication, and percentage questions. Choose difficulty level, question types, and time limit. Estimator Four is one of the Interactivate assessment games.
Estimator Quiz	Test your estimation skills by answering questions. This quiz asks you to estimate the answer to addition, multiplication, and percentage questions. Choose difficulty level, question types, and time limit. Estimator Quiz is one of the Interactivate assessment quizzes.
Factorize	Visualize factors through building rectangular areas on a grid. First enter all the factorizations of a number, then draw each factor set as an area on the grid. Factorize is one of the Interactivate assessment explorers.
Factorize 2	Visualize factors through building rectangular areas on a grid. As you draw each factor set on the grid, the factors will be listed. Factorize 2 is one of the Interactivate assessment explorers.
Fire: Estimating Percent	Learn about percent through burning a virtual forest. The activity allows the user to burn a stand of trees and then guess either the percent of trees burned or the number that actually burned.
Fraction Finder	Graphically determine the value of two given fractions represented as points on a number line. Graphically find a fraction whose value is between the two given fractions, then determine its value. Fraction Finder is one of the Interactivate assessment explorers.
Fraction Four	Students play a generalized version of connect four, gaining the chance to place a piece on the board by answering questions about simplify fractions, converting fractions to decimals and percents, as well as algebra questions involving fractions. Parameters: Level of difficulty and question type. Fraction Four is one of the Interactivate assessment games.
Fraction Pointer	Graphically determine the value of two given fractions represented as points on a number line. Graphically find a fraction whose value is between the two given fractions (using an arrow on the number line as a guide), then determine its value. Fraction Pointer is one of the Interactivate assessment explorers.
Fraction Quiz	Test your fraction skills by answering questions. This quiz asks you to simplify fractions, convert fractions to decimals and percentages, and answer algebra questions involving fractions. Choose difficulty level, question types, and time limit. Fraction Quiz is one of the Interactivate assessment quizzes.
Fraction Sorter	Visualize fractions by coloring in the appropriate portions of either a circle or a square, then order those fractions from least to greatest. Fraction Sorter is one of the Interactivate assessment explorers.
Function Machine	Students investigate very simple functions by trying to guess the algebraic form from inputs and outputs. Function Machine is one of the Interactivate assessment explorers.
Linear Function Machine	Students investigate linear functions by trying to guess the slope and intercept from inputs and outputs. Linear Function Machine is one of the Interactivate assessment explorers.
Mixtures	Mixtures allows exploration of percents through two piles of colored and uncolored chips. The user must decide how many chips to color to create the desired percentage of colored chips compared to the total pile. Mixtures is one of the Interactivate assessment explorers.
More or Less Estimator	Practice estimation skills by determining whether the number of objects, the length of a line, or the area of a shape is more or less than the number given. Parameters: error tolerance. More or Less Estimator is one of the Interactivate assessment explorers.
Number Base Clocks	Visually explore counting and place value with different number bases, from base 2 to base 16, and up to the hundreds place using a clock like interface. The activity also allows you to look at the numbers on the clock in base 10 or in your other chosen base to explore the relationship between those values.
Number Cruncher	Similar to the original "Function Machine" but lists input and output in a table and will not let the user attempt to guess the rule on without at least having two data points.
Order of Operations Four	A game like Fraction Four but instead of fraction questions the player must answer order of operations questions (addition / subtraction, multiplication / division, exponents, and parentheses) to earn a piece to place on the board. Parameters: time limit, difficulty level, types of questions. Order of Operations Four is one of the Interactivate assessment games.
Order of Operations Quiz	This activity allows the user to practice order of operations with addition / subtraction, multiplication / division, exponents, and parentheses. Order of Operations Quiz is one of the Interactivate assessment quizzes.
Pattern Generator	Recognize patterns in a series of shapes, numbers, or letters. After determining the pattern, the student fills in the missing pieces. Three levels of difficulty are available.
Positive Linear Function Machine	Students investigate linear functions with positive slopes by trying to guess the slope and intercept from inputs and outputs.
Sequencer	Learn about number patterns in sequences and recursions by specifying a starting number, multiplier, and add-on. The numbers in the sequence are displayed on a graph, and they are also listed below the graph.
Single Fraction Finder	Graphically determine the value of a given fraction represented as a point on a number line. Graphically find a fraction whose value is a given fraction. Fraction Pointer is one of the Interactivate assessment explorers.
Single Fraction Pointer	Graphically determine the value of a given fraction represented as a point on a number line. Graphically find a fraction whose value is the given fraction using an arrow on the number line as a guide. Single Fraction Pointer is one of the Interactivate assessment explorers.
Tables and Chairs	Explore rectangular and straight-line arrangements of tables, calculating the number of chairs needed to surround different arrangements thereby exploring perimeter concepts. Tables and Chairs is one of the Interactivate assessment explorers.
Tortoise and Hare Race	Step through the tortoise and hare race, based on Zeno's paradox, to learn about the multiplication of fractions and about convergence and limits to an infinite sequence.
Venn Diagram Shape Sorter	Sort colored shapes into a Venn Diagram. Appropriate for elementary grades.
Whole Number Cruncher	Give input to the Whole Number Cruncher and try to guess what it did from the output it generates. This activity only generates multiplication and addition functions to avoid outputting any negative numbers. Whole Number Cruncher is one of the Interactivate assessment explorers.

Geometry

Angles	Practice your knowledge of acute, obtuse, and alternate angles. Also, practice relationships between angles formed by parallel lines - vertical, adjacent, alternate, same-side, and corresponding. Angles is one of the Interactivate assessment explorers.
Another Hilbert Curve Generator	Students work step-by-step through the generation of a different Hilbert-like Curve (a fractal made from deforming a line by bending it), allowing them to explore number patterns in sequences and geometric properties of fractals.
Area Explorer	Learn the difference between perimeter and area. A shape will be automatically generated with the perimeter that you choose. Calculate the area of this shape. Area Explorer is one of the Interactivate assessment explorers.
Clock Wise	Practice reading a clock, input times for the clock to display, or let the clock generate random times for you to read. Choose from three difficulty levels.
Elapsed Time	Practice finding elapsed time given a starting time and an ending time. Elapsed Time is one of the Interactivate assessment explorers.
Flake Maker	Create your own fractals by drawing a "line deformation rule" and stepping through the generation of a geometric fractal. Parameters: Grid type, number of bending points on the line.
Floor Tiles	Build a "floor tile" by dragging the corners of a quadrilateral. Learn about tessellations created from quadrilaterals when the shape you build is tiled over a plane.
Fractal Dimensions	Determine the fractal dimensions of several line-deformation fractals. Input the scale factor and number of similar copies, and the dimension will be calculated. Fractal Dimensions is one of the Interactivate assessment explorers.
Fractured Pictures	Generate complicated geometric fractals by specifying starting polygon and scale factor.
Hilbert Curve Generator	Step through the generation of a Hilbert Curve -- a fractal made from deforming a line by bending it, and explore number patterns in sequences and geometric properties of fractals.
Image Tool	Measure angles, distances, and areas in several different images (choices include maps, aerial photos, and others). A scale feature allows the user to set the scale used for measuring distances and areas.
Julia Sets	Enter a complex value for "c" in the form of an ordered pair of real numbers. The applet draws the fractal Julia set for that seed value.
Koch's Snowflake	Step through the generation of the Koch Snowflake -- a fractal made from deforming the sides of a triangle, and explore number patterns in sequences and geometric properties of fractals.
Perimeter Explorer	Learn the difference between perimeter and area. A shape will be automatically generated with the area that you choose. Calculate the perimeter of this shape. Perimeter Explorer is one of the Interactivate assessment explorers.
Pythagorean Explorer	Calculate the length of one side of an automatically generated right triangle by using the Pythagorean Theorem, and then check your answers. Pythagorean Explorer is one of the Interactivate assessment explorers.
Shape Builder	This activity operates in one of two modes: auto draw and create shape mode, allowing you to explore relationships between area and perimeter. Shape Builder is one of the Interactivate assessment explorers.
Shape Explorer	Learn the difference between perimeter and area. A random shape will be automatically generated. Calculate the area and perimeter of this shape. Shape Explorer is one of the Interactivate assessment explorers.
Sierpinski's Carpet	Step through the generation of Sierpinski's Carpet -- a fractal made from subdividing a square into nine smaller squares and cutting the middle one out. Explore number patterns in sequences and geometric properties of fractals.
Sierpinski's Triangle	Step through the generation of Sierpinski's Triangle -- a fractal made from subdividing a triangle into four smaller triangles and cutting the middle one out. Explore number patterns in sequences and geometric properties of fractals.
Squaring the Triangle	Learn about how the Pythagorean Theorem works through investigating the standard geometric proof. Parameters: Sizes of the legs of the triangle.
Stopwatch	Functions like a real stopwatch, recording times that you choose. This stopwatch is accurate to the nearest tenth of a second. Parameters: Count up from 0 or count down from a set time.
Surface Area and Volume	Manipulate dimensions of a triangular or rectangular prism, and investigate how the surface area and volume change. Parameters: length, width and height.
Tessellate!	Create a tessellation by deforming a triangle, rectangle or hexagon to form a polygon that tiles the plane. Corners of the polygons may be dragged, and corresponding edges of the polygons may be dragged. Parameters: Colors, starting polygon.
The Chaos Game	Play the Chaos Game by experimenting with probabilities. Learn about an apparently random process with a not-so-random, geometric fractal result.
The Mandelbrot Set	Investigate the relationships between the famous Mandelbrot Set fractal and Julia sets by clicking and zooming.
Transmographer	Explore the world of translations, reflections, and rotations in the Cartesian coordinate system by performing transformations on squares, triangles and parallelograms. Parameters: Shape, x or y translation, reflections across vertical and horizontal lines, angle and point of rotation.
Transmographer 2	Build your own polygon and transform it in the Cartesian coordinate system. Experiment with reflections across any line, rotations about any point, and translations in any direction. Parameters: Shape, x or y translation, x or y reflection, angle of rotation
Triangle Explorer	Calculate the area of a triangle drawn on a grid. Learn about areas of triangles and about the Cartesian coordinate system. Triangle Explorer is one of the Interactivate assessment explorers.
Two Variable Function Pump	Enter two complex numbers (z and c) as ordered pairs of real numbers, then click a button to iterate step by step. The iterates are graphed in the x-y plane and printed out in table form. This is an introduction to the idea of prisoners/escapees in iterated functions and the calculation of fractal Julia sets.

Algebra

Algebra Four	Students play a generalized version of connect four, gaining the chance to place a piece on the board by solving an algebraic equation. Parameters: Level of difficulty of equations to solve and type of problem. Algebra Four is one of the Interactivate assessment games.
Algebra Quiz	Test your algebra skills by answering questions. This quiz asks you to solve algebraic linear and quadratic equations of one variable. Choose difficulty level, question types, and time limit. Algebra Quiz is one of the Interactivate assessment quizzes.
Conic Flyer	Manipulate different types of conic section equations on a coordinate plane using slider bars. Learn how each constant and coefficient affects the resulting graph. Choose from vertical or horizontal parabola, circle, ellipse, and vertical or horizontal hyperbola.
Data Flyer	Enter a set of data points, then derive a function to fit those points. Manipulate the function on a coordinate plane using slider bars. Learn how each constant and coefficient affects the resulting graph.
Derivate	Begin understanding the meaning of the derivative at a point on a function. View the graph and the equation of the line tangent to any function at any point on the function.
Fraction Four	Students play a generalized version of connect four, gaining the chance to place a piece on the board by answering questions about simplify fractions, converting fractions to decimals and percents, as well as algebra questions involving fractions. Parameters: Level of difficulty and question type. Fraction Four is one of the Interactivate assessment games.
Fraction Quiz	Test your fraction skills by answering questions. This quiz asks you to simplify fractions, convert fractions to decimals and percentages, and answer algebra questions involving fractions. Choose difficulty level, question types, and time limit. Fraction Quiz is one of the Interactivate assessment quizzes.
Function Flyer	A more advanced version of Slope Slider, this activity allows the manipulation of the constants and coefficients in any function thereby encouraging the user to explore the effects on the graph of the function by changing those numbers.
Function Machine	Students investigate very simple functions by trying to guess the algebraic form from inputs and outputs. Function Machine is one of the Interactivate assessment explorers.
General Coordinates Game	Investigate the Cartesian coordinate system through identifying the coordinates of a randomly generated point, or requesting that a particular point be plotted. General Coordinates Game is one of the Interactivate assessment explorers.
Graph Sketcher	Students can create graphs of functions by entering formulas -- similar to a graphing calculator.
Graphit	Create graphs of functions and sets of ordered pairs on the same coordinate plane. This is like a graphing calculator with advanced viewing options.
InteGreat!	InteGreat! allows the user to visually explore the idea of integration through approximating the integral value with partitions. The activity integrates a function and displays the value of the definite integral as well as overlays the specified number of partitions on the graph of the function. The user controls the number of partitions and the upper and lower limits.
Linear Function Machine	Students investigate linear functions by trying to guess the slope and intercept from inputs and outputs. Linear Function Machine is one of the Interactivate assessment explorers.
Linear Inequalities	Students create linear inequalities and systems of linear inequalities on a coordinate plane. This is like a graphing calculator with advanced viewing options.
Maze Game	Investigate the Cartesian coordinate system by directing a robot through a mine field laid out on the plane. Maze Game is one of the Interactivate assessment explorers.
Multi-Function Data Flyer	Enter a set of data points and a function or multiple functions, then manipulate those functions to fit those points. Manipulate the function on a coordinate plane using slider bars. Learn how each constant and coefficient affects the resulting graph.
Number Cruncher	Similar to the original "Function Machine" but lists input and output in a table and will not let the user attempt to guess the rule on without at least having two data points.
Ordered Simple Plot	Plot ordered pairs on the graph, and they will be connected in the order that they are input. This enables you to decide how the pairs should be connected, rather than having the computer connect them from left to right.
Positive Linear Function Machine	Students investigate linear functions with positive slopes by trying to guess the slope and intercept from inputs and outputs.
Possible or Not	Review the properties of functions by looking at ten different curves and deciding whether or not they meet the criteria for a graph of a function. This activity simply displays the curves - it does not quiz the user.
Recursion	Graph recursive functions by defining f(0)=C and defining f(n) based on f(n-1).
Sequencer	Learn about number patterns in sequences and recursions by specifying a starting number, multiplier, and add-on. The numbers in the sequence are displayed on a graph, and they are also listed below the graph.
Simple Coordinates Game	Investigate the first quadrant of the Cartesian coordinate system through identifying the coordinates of randomly generated points, or requesting that a particular point be plotted. Simple Coordinates Game is one of the Interactivate assessment explorers.
Simple Maze Game	Investigate the first quardant of the Cartesian coordinate system by directing a robot through a mine field laid out on the grid.
Simple Plot	Plot ordered pairs of numbers, either as a scatter plot or with the dots connected. Points are connected from right to left, rather than being connected in the order they are entered.
Slope Slider	Manipulate a linear function of the form f(x)=mx+b using slider bars. Explore the relationship between slope and intercept in the Cartesian coordinate system.
Two Variable Function Pump	Enter two complex numbers (z and c) as ordered pairs of real numbers, then click a button to iterate step by step. The iterates are graphed in the x-y plane and printed out in table form. This is an introduction to the idea of prisoners/escapees in iterated functions and the calculation of fractal Julia sets.
Vertical Line Test	Learn about the vertical line test for functions by trying to connect points in the plane to build a function. When you have connected all of the points, you will be told if your graph is a valid graph of a function. Vertical Line Test is one of the Interactivate assessment explorers.
Whole Number Cruncher	Give input to the Whole Number Cruncher and try to guess what it did from the output it generates. This activity only generates multiplication and addition functions to avoid outputting any negative numbers. Whole Number Cruncher is one of the Interactivate assessment explorers.

Probability

A Better Fire!!	Students run a simulation of how a fire will spread through a stand of trees, learning about probability and chaos. Parameters: Forest density, wind direction, size of forest.
Adjustable Spinner	Create a game spinner with variable sized sectors to look at experimental and theoretical probabilities. Parameters: Sizes of sectors, number of sectors, number of trials.
Advanced Monty Hall	Choose one of N doors to experimentally determine the odds of winning the grand prize behind one of the doors, as in the TV program "Let's Make a Deal" thereby exploring the unexpected probabilities resulting from this experiment. Parameters: Number of doors, number of trials, staying or switching between the two remaining doors.
Buffon's Needle	Experiment with a simulation to get an approximation of Pi by dropping a needle on a lined sheet of paper.
Coin Toss	Simulation of a coin toss allowing the user to input the number of flips thereby exploring experimental and theoretical probabilities. Toss results can be viewed as a list of individual outcomes, ratios, or table.
Crazy Choices Game	Compare theoretical and experimental probabilities, using dice, cards, spinners, or coin tosses. Three different probabilities can be compared at once. Parameters: Type of probabilities, number of trials.
Dice Table	Experiment with the outcome distribution for a roll of two dice by simulating a dice throwing game. Parameters: Which player wins with which total rolled.
Directable Fire!!	Run a simulation of how a fire will spread through a stand of trees, learning about probability and chaos. Parameters: Probability that a tree will set fire to each of its eight neighbors.
Experimental Probability	Experiment with probability using a fixed size section spinner, a variable section spinner, two regular 6-sided dice or customized dice. Appropriate for elementary grades.
Fire!!	Run a simulation of how a fire will spread through a stand of trees, learning about probability and chaos. Parameters: Probability that a tree catches fire if its neighbor is on fire. Probabilities are input as fractions or decimals.
Generalized Monty Hall	Run a simulation to generate results from running the Monty Hall for multiple trials thereby exploring the unexpected probabilities resulting from this experiment. This is similar to the game show "Let's Make A Deal", where you choose one of N doors in hopes of finding a grand prize behind one of the doors. Parameters: Number of doors, number of trials, staying, or switching between the two remaining doors.
Marbles	Learn about sampling with and without replacement by randomly drawing marbles from a bag. Parameters: Number and color of marbles in the bag, replacement rule.
Racing Game with One Die	Experiment with probability and "fairness" with this simulation where two players each roll a die, and the lucky player moves one step towards the finish. Parameters: what rolls win and how many steps to the finish line.
Racing Game with Two Dice	Experiment with probability and "fairness" with this simulation where "N" players roll two dice, and the lucky player moves one step toward the finish on each roll. Parameters: the number of players, number of trials, and length of the race.
Simple Monty Hall	Choose one of three doors to experimentally determine the odds of winning the grand prize behind one of the doors, as in the TV program "Let's Make a Deal" thereby exploring the unexpected probabilities resulting from this experiment. Parameters: Staying or switching between the two remaining doors.
Spinner	Create a game spinner with one to twelve sectors to look at experimental and theoretical probabilities. Parameters: Number of sectors, number of trials.
Two Colors Applet	Choose one of three boxes and choose one ball from the box to look at conditional probabilities. Parameters: Number of trials.

Statistics

Adjustable Spinner	Create a game spinner with variable sized sectors to look at experimental and theoretical probabilities. Parameters: Sizes of sectors, number of sectors, number of trials.
Advanced Monty Hall	Choose one of N doors to experimentally determine the odds of winning the grand prize behind one of the doors, as in the TV program "Let's Make a Deal" thereby exploring the unexpected probabilities resulting from this experiment. Parameters: Number of doors, number of trials, staying or switching between the two remaining doors.
Bar Graph	Enter data to create a bar graph, then change many settings for the graph's appearance.
Bar Graph Sorter	Sort colored shapes into a bar graph. Practice sorting by shape or by color. Appropriate for elementary grades.
Box Plot	Students can create box plots which DO use the median in calculating the interquartile ranges for either built in or user-specified data as well as experiment with outliers. These graphs are also known as box-and-whisker plots.
Box Plot 2	Create boxplots which do not use the median in calculating the interquartile ranges for either built in or user-specified data. This also allows the user to experiment with outliers. These graphs are also known as box-and-whisker plots.
Circle Graph	Enter your own data categories and the value of each category to create a pie chart. There are also built in data sets which can be viewed.
Data Flyer	Enter a set of data points, then derive a function to fit those points. Manipulate the function on a coordinate plane using slider bars. Learn how each constant and coefficient affects the resulting graph.
Histogram	View histograms for built-in or user-specified data. Experiment with how the size of the class intervals influences the appearance of the histogram. Parameters: Data sets, class sizes.
Measures	Enter data and view the mean, median, variance, and standard deviation of the data set. Parameters: Number of observations, range for observations, which statistics to view, identifiers for the data.
Multi Bar Graph	Enter data to create a double bar graph, then manipulate the graph's maximum and minimum values.
Normal Distribution	Change the standard deviation of an automatically generated normal distribution to create a new histogram. Observe how well the histogram fits the curve, and how areas under the curve correspond to the number of trials. Parameters: standard deviation, number of trials, class intervals.
Pie Chart	Create a pie graph, adjusting the size of the divisions using your mouse or by entering values. Parameters: Number of sections, size of sections, whether to use percents or fractions.
Plop It!	Build line plots of data using your mouse. View how the mean, median, and mode change as entries are added to the plot. Parameters: Range for observations.
Rabbits and Wolves	Experiment with a simple ecosystem consisting of grass, rabbits, and wolves, learning about probabilities, chaos, and simulation.
Regression	Plot a bivariate data set, determine the line of best fit for their data, and then check the accuracy of your line of best fit.
Scatter Plot	Graph ordered pairs and customize the graph title and axis labels. Points are connected from left to right, rather than being connected in the order they are entered.
Simple Plot	Plot ordered pairs of numbers, either as a scatter plot or with the dots connected. Points are connected from right to left, rather than being connected in the order they are entered.
Skew Distribution	Change the median and standard deviation of an automatically generated normal distribution to create a skewed distribution, allowing them to observe properties like what it means for the mean, median, and mode to be different. Parameters: median, standard deviation, number of trials, class intervals.
Stem and Leaf Plotter	View stem-and-leaf plots of your own data, and then practice finding means, medians and modes. Parameters: Data

Modeling

A Better Fire!!	Students run a simulation of how a fire will spread through a stand of trees, learning about probability and chaos. Parameters: Forest density, wind direction, size of forest.
Advanced Monty Hall	Choose one of N doors to experimentally determine the odds of winning the grand prize behind one of the doors, as in the TV program "Let's Make a Deal" thereby exploring the unexpected probabilities resulting from this experiment. Parameters: Number of doors, number of trials, staying or switching between the two remaining doors.
Data Flyer	Enter a set of data points, then derive a function to fit those points. Manipulate the function on a coordinate plane using slider bars. Learn how each constant and coefficient affects the resulting graph.
Directable Fire!!	Run a simulation of how a fire will spread through a stand of trees, learning about probability and chaos. Parameters: Probability that a tree will set fire to each of its eight neighbors.
Fire!!	Run a simulation of how a fire will spread through a stand of trees, learning about probability and chaos. Parameters: Probability that a tree catches fire if its neighbor is on fire. Probabilities are input as fractions or decimals.
Life	Run the classic game of life, learning about probabilities, chaos and simulation. This activity allows the user to run a randomly generated world or test out various patterns. This is a very powerful activity with a wide range of options. It runs in a separate window.
Life Lite	Run the classic game of life, learning about probabilities, chaos and simulation. This activity allows the user to run a randomly generated world or test out various patterns. This is a simple activity which runs directly in the Interactivate window.
Rabbits and Wolves	Experiment with a simple ecosystem consisting of grass, rabbits, and wolves, learning about probabilities, chaos, and simulation.
Tables and Chairs	Explore rectangular and straight-line arrangements of tables, calculating the number of chairs needed to surround different arrangements thereby exploring perimeter concepts. Tables and Chairs is one of the Interactivate assessment explorers.

Discrete

Venn Diagram Shape Sorter	Sort colored shapes into a Venn Diagram. Appropriate for elementary grades.
Venn Diagrams	Classify various objects into categories in a Venn Diagram. Learn how categories in Venn Diagrams work. Venn Diagrams is one of the Interactivate assessment explorers.

Other

A Better Fire!!	Students run a simulation of how a fire will spread through a stand of trees, learning about probability and chaos. Parameters: Forest density, wind direction, size of forest.
Tessellate!	Create a tessellation by deforming a triangle, rectangle or hexagon to form a polygon that tiles the plane. Corners of the polygons may be dragged, and corresponding edges of the polygons may be dragged. Parameters: Colors, starting polygon.
Venn Diagram Shape Sorter	Sort colored shapes into a Venn Diagram. Appropriate for elementary grades.
Venn Diagrams	Classify various objects into categories in a Venn Diagram. Learn how categories in Venn Diagrams work. Venn Diagrams is one of the Interactivate assessment explorers.