Meredith Applets
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Bar Graph
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Enter data to create a bar graph, then manipulate the graph's maximum and minimum values.
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Boxplot 1
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Students can create boxplots which DO use the median in calculating the interquartile ranges
for either built-in or user-specified data as well as experiment with outliers.
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Boxplot 2
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Students can create boxplots which DO NOT use the median in calculating the interquartile
ranges for either built-in or user-specified data as well as experiment with outliers.
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Buffon's Needle
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Students experiment with a simulation to get an approximation of Pi.
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Circle Graph
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Enter data categories and the value of each category to create a circle graph. Similar to "Pie Chart" but the user can define the data set.
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Crazy Choices Game
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Three players play games of chance using dice, cards, spinners or coin tosses, to compare theoretical and experimental probabilities. Parameters: Type of game for each player, number of trials.
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The Chaos Game
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Students play the Chaos Game by experimenting with probabilities, and they learn about an apparently random process with a not-so-random, geometric fractal result.
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Dice Table
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Students experiment with the outcome distribution for a roll of two dice by playing a dice throwing game. Parameters: Which player wins on which rolls.
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Derivative Applet
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View the graph and the equation of the line tangent to any function at any point on the function.
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Fire!!
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Students 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 catch fire if its neighbor is on fire.
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Directable Fire!!
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Students run a simulation of how a fire will spread through a stand of trees, learning about
probability and chaos. Panrameters: Probability that a tree will set fire to each of its eight neighbors.
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A Better Fire!!
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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.
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Function Flyer
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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.
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Data Flyer
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Similar to Function Flyer, but with the capability of plotting data points as well as a function. Then you can tweak the function to fit the data.
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Graphit
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Students can graph functions and sets of ordered pairs on the same coordinate plane -- similar to a graphing calculator.
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Histogram
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Students can view histograms for either built-in or user-specified data, and experiment with how the size of the class intervals influences the perceptions. Parameters: Data sets, class sizes.
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InteGreat!
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Visually examine definite integrals (summations) of any function. The applet allows the
user to choose from various discrete methods of integration to compare the accuracy of these methods.
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Life
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Students run the classic game of life, learning about probabilities, chaos and simulation. Parameters: Type of world, types of "life," rules for living.
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Life Lite
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Similar to Life with fewer options for creatures and world configuration.
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Marbles
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Students learn about sampling with and without replacement by modeling drawing marbles from a bag. Parameters: Number and color of marbles in the bag, replacement rule.
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Measures
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Students 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.
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Simple Monty Hall
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Students 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." Parameters: Staying or switching between the two remaining doors.
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Generalized Monty Hall
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Students run a simulation to mimic the simple monty hall activity with multiple trials. Parameters: Number of doors, number of trials, staying or switching between the two remaining doors.
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Advanced Monty Hall
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Students 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." Parameters: Number of doors, number of trials, staying or switching between the two remaining doors.
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Normal Distribution
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Students can change the standard deviation of the graphed normal distribution to create a new distribution, allowing them to observe properties like how well the histogram fits the curve and how areas under the curve correspond to the probability that a number is selected. Parameters: standard deviation, number of trials, class intervals.
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PieChart
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Students view piecharts. Parameters: Number of sectors, size of sector as a percent.
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Plop It!
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Students click to build dot plots of data and view how the mean, median, and mode change as numbers are added to the plot. Parameters: Range for observations.
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Understanding Experimental Probability
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Experiment with experimental probability using a fixed size section spinner, a variable section spinner, 2 regular 6-sided number cubes or design your own number cubes.
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Rabbits and Wolves
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Students experiment with a simple ecosystem consisting of grass, rabbits and wolves, learning about probabilities, chaos and simulation.
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Racing Game with One Die
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Two players each roll a die, and the lucky player moves one step to the finish. Parameters: what rolls win and how many steps to the finish line.
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Racing Game with Two Dice
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N players roll two dice, the lucky player moves one step to the finish, or everybody moves one step and the lucky player moves two steps to the finish. Parameters: the number of players, number of trials and length of the race.
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Sequencer
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Students learn about number patterns in sequences and recursions by specifying a starting number, multiplier and add-on.
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Skew Distribution
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Students can change the median standard deviation of the graphed 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.
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Spinner
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Students can create a game spinner with one to twelve sectors to look at experimental and theoretical probabilities. Parameters: Number of sectors, number of trials.
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Stem and Leaf Plotter
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Students view stem-and-leaf plots of their data, and then get to practice finding means, medians and modes. Parameters:Data.
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Stock Exchange
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Students learn about expected value and payoff for an event that will occur with a known probability, by playing a game in which the payoff is earnings from stocks. Parameters: Probability of receiving cash, cash amounts, number of trials.
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Stopwatch
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Functions just like a real stopwatch as well as recording set times, accurate to the nearest tenth of a second. Parameters: Count up from 0 or count down from a set time.
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Surface Area & Volume
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Students manipulate dimensions of polyhedra, and watch how the surface area and volume change. Parameters: Type of polyhedron, length, width and height.
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Tessellate!
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Students deform 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.
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TransmoGrapher2
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Students explore the world of translations, reflections, and rotations in the Cartesian coordinate system by transforming squares, triangles and parallelograms. It also allows reflections across any line and rotations about any point. It also allows the user to specify the vertices of the polygon used. Parameters: Polygon, x or y translation, line of reflection, angle of rotation, point to rotate about.
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Two Colors Applet
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Students choose between three boxes and choose one marble from the box to look at conditional probabilities. Parameters: Number of trials.
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Venn Diagrams
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Students learn about classifying numbers into various categories through answering questions about Venn Diagrams.
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Venn Diagrams 2
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Students learn about classifying numbers into various categories through assigning elements to subsets in a Venn Diagram.
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