![Abacus icon](images1/icons/abacus_n.gif) |
Abacus – An electronic abacus that can be used to do arithmetic. |
![Base Blocks icon](images1/icons/multbasebl_n.gif) |
Base Blocks – Illustrate addition and subtraction in a variety of bases. |
![Base Blocks Addition icon](images1/icons/baseblksadd_n.gif) |
Base Blocks Addition – Use base ten blocks to model grouping in addition. |
![Base Blocks Decimals icon](images1/icons/baseblksadd_n.gif) |
Base Blocks Decimals – Add and subtract decimal values using base blocks. |
![Base Blocks Subtraction icon](images1/icons/baseblksubtract_n.gif) |
Base Blocks Subtraction – Use base ten blocks to model separation of groups in subtraction. |
![Chip Abacus icon](images1/icons/chipabacus_n.gif) |
Chip Abacus – Learn about carrying and digits using chips. |
![Circle 0 icon](images1/icons/circle14_n.gif) |
Circle 0 – A puzzle involving adding positive and negative integers to sum to zero. |
![Circle 21 icon](images1/icons/circle14_n.gif) |
Circle 21 – A puzzle involving adding positive and negative integers to sum to twenty one. |
![Circle 3 icon](images1/icons/circle14_n.gif) |
Circle 3 – A puzzle involving adding positive real numbers to sum to three. |
![Circle 99 icon](images1/icons/circle14_n.gif) |
Circle 99 – A puzzle involving adding positive and negative integers to sum to ninety nine. |
![Color Chips - Subtraction icon](images1/icons/pluschips_n.gif) |
Color Chips - Subtraction – Use color chips to illustrate subtraction of integers. |
![Conway's Game of Life icon](images1/icons/conwaygamelife_n.gif) |
Conway's Game of Life – Discover the rules that determine change in these simulations. |
![Diffy icon](images1/icons/diffy_n.gif) |
Diffy – Solve an interesting puzzle involving the differences of given numbers. |
![Dueling Calculators icon](images1/icons/duelingcalc_n.gif) |
Dueling Calculators – Visualize a dramatic simulation of the effect of propagating rounding errors. |
![Factor Tree icon](images1/icons/factortree_n.gif) |
Factor Tree – Factor numbers using a tree diagram. |
![Fibonacci Sequence icon](images1/icons/fibonacci_n.gif) |
Fibonacci Sequence – Explore the Fibonacci sequence and the golden ratio. |
![Fraction Pieces icon](images1/icons/fractionpieces_n.gif) |
Fraction Pieces – Work with parts and wholes to learn about fractions. |
![Fractions - Adding icon](images1/icons/addingfract_n.gif) |
Fractions - Adding – Illustrates what it means to find a common denominator and combine. |
![Fractions - Comparing icon](images1/icons/comparfract_n.gif) |
Fractions - Comparing – Judge the size of fractions and plot them on a number line. |
![Fractions - Equivalent icon](images1/icons/equivfract_n.gif) |
Fractions - Equivalent – Illustrates relationships between equivalent fractions. |
![Fractions - Rectangle Multiplication icon](images1/icons/rmfractions_n.gif) |
Fractions - Rectangle Multiplication – Visualize and practice multiplying fractions using an area representation. |
![Function Machine icon](images1/icons/fnmachine_n.gif) |
Function Machine – Explore the concept of functions by putting values into this machine and observing its output. |
![Golden Rectangle icon](images1/icons/goldenrectangle_n.gif) |
Golden Rectangle – Illustrates iterations of the Golden Section. |
![Grapher icon](images1/icons/2dgrapher_n.gif) |
Grapher – A tool for graphing and exploring functions. |
![Mastermind icon](images1/icons/mastermind_n.gif) |
Mastermind – Use inference and logic to play a game and guess a hidden pattern of pegs. |
![Money icon](images1/icons/money_n.gif) |
Money – Learn about money by counting and making change. |
![Number Line Bars - Fractions icon](images1/icons/nlfractionbars_n.gif) |
Number Line Bars - Fractions – Divide fractions using number line bars. |
![Number Line Bounce icon](images1/icons/numlinebounce_n.gif) |
Number Line Bounce – Number line addition and subtraction game. |
![Number Puzzles icon](images1/icons/numberpuzz_n.gif) |
Number Puzzles – Solve puzzles involving arranging numbers on a diagram so that they add up to a given value. |
![Pascal's Triangle icon](images1/icons/pascalstri_n.gif) |
Pascal's Triangle – Explore patterns created by selecting elements of Pascal's triangle. |
![Peg Puzzle icon](images1/icons/pegpuzzle_n.gif) |
Peg Puzzle – Win this game by moving the pegs on the left past the pegs on the right. |
![Percent Grids icon](images1/icons/percentgrids_n.gif) |
Percent Grids – Represent, name, and explore percentages using hundreds grids. |
![Percentages icon](images1/icons/percentages_n.gif) |
Percentages – Discover relationships between fractions, percents, and decimals. |
![Sieve of Eratosthenes icon](images1/icons/sieveeratos_n.gif) |
Sieve of Eratosthenes – Relate number patterns with visual patterns. |
![Spinners icon](images1/icons/spinner_n.gif) |
Spinners – Work with spinners to learn about numbers and probabilities. |
![Tangrams icon](images1/icons/tangrams_n.gif) |
Tangrams – Use all seven Chinese puzzle pieces to make shapes and solve problems. |
![Tight Weave icon](images1/icons/tightweave_n.gif) |
Tight Weave – Visualize the creation of the Sierpinski Carpet, an iterative geometric pattern that resembles a woven mat. |
![Turtle Geometry icon](images1/icons/turtlegeometry_n.gif) |
Turtle Geometry – Explore numbers, shapes, and logic by programming a turtle to move. |
![Venn Diagrams icon](images1/icons/venndiag_n.gif) |
Venn Diagrams – Investigate common features of sets. |
![Algebra Balance Scales icon](images1/icons/bbalgebra_n.gif) |
Algebra Balance Scales – Solve simple linear equations using a balance beam representation. |
![Algebra Balance Scales - Negatives icon](images1/icons/bbalgebra_n.gif) |
Algebra Balance Scales - Negatives – Solve simple linear equations using a balance beam representation. |
![Algebra Tiles icon](images1/icons/algebratiles_n.gif) |
Algebra Tiles – Visualize multiplying and factoring algebraic expressions using tiles. |
![Base Blocks icon](images1/icons/multbasebl_n.gif) |
Base Blocks – Illustrate addition and subtraction in a variety of bases. |
![Block Patterns icon](images1/icons/genrule_n.gif) |
Block Patterns – Analyze sequences of figures using pictures, tables, plots, and graphs. |
![Coin Problem icon](images1/icons/coinproblem_n.gif) |
Coin Problem – Use deduction to find the counterfeit coin. |
![Factor Tree icon](images1/icons/factortree_n.gif) |
Factor Tree – Factor numbers using a tree diagram. |
![Fifteen Puzzle icon](images1/icons/fifteen_n.gif) |
Fifteen Puzzle – Solve this virtual version of the classical fifteen puzzle by arranging its tiles. |
![Function Machine icon](images1/icons/fnmachine_n.gif) |
Function Machine – Explore the concept of functions by putting values into this machine and observing its output. |
![Function Transformations icon](images1/icons/trexplorer_n.gif) |
Function Transformations – Explore how simple transformations affect the graph of a function. |
![Grapher icon](images1/icons/2dgrapher_n.gif) |
Grapher – A tool for graphing and exploring functions. |
![Line Plotter icon](images1/icons/lineplotter_n.gif) |
Line Plotter – Practice drawing lines through a given point having a specified slope. |
![Pattern Blocks icon](images1/icons/patternblocks_n.gif) |
Pattern Blocks – Use six common geometric shapes to build patterns and solve problems. |
![Peg Puzzle icon](images1/icons/pegpuzzle_n.gif) |
Peg Puzzle – Win this game by moving the pegs on the left past the pegs on the right. |
![Pentominoes icon](images1/icons/pentominoes_n.gif) |
Pentominoes – Use the 12 pentomino combinations to solve problems. |
![Point Plotter icon](images1/icons/plotpts_n.gif) |
Point Plotter – Practice plotting ordered pairs on a graph. |
![Polyominoes icon](images1/icons/polyominoes_n.gif) |
Polyominoes – Build and compare characteristics of biominoes, triominoes, quadrominoes, etc. |
![Space Blocks icon](images1/icons/spaceblocks_n.gif) |
Space Blocks – Create and discover patterns using three dimensional blocks. |
![Stick or Switch icon](images1/icons/makeadeal_n.gif) |
Stick or Switch – Investigate probabilities of sticking with a decision, or switching. |
![Towers of Hanoi icon](images1/icons/towerofhanoi_n.gif) |
Towers of Hanoi – Solve the tower problem and test your theory by varying the number of disks. |
![Triominoes icon](images1/icons/triomino_n.gif) |
Triominoes – Manipulate the puzzle pieces and find multiple solutions. |
![Attribute Trains icon](images1/icons/attributetrain_n.gif) |
Attribute Trains – Learn about shape and color patterns of by completing trains of blocks. |
![Cob Web Plot icon](images1/icons/cobwebplot_n.gif) |
Cob Web Plot – Change variables and observe patterns from this graphing simulation. |
![Congruent Triangles icon](images1/icons/simtriangles_n.gif) |
Congruent Triangles – Build similar triangles by combining sides and angles. |
![Fractals - Iterative icon](images1/icons/iterativefract_n.gif) |
Fractals - Iterative – Generate six different fractals. |
![Fractals - Koch and Sierpinski icon](images1/icons/kochtriangle_n.gif) |
Fractals - Koch and Sierpinski – Change colors and pause this fractal simulation at any point. |
![Fractals - Mandelbrot and Julia Sets icon](images1/icons/mandeljuliast_n.gif) |
Fractals - Mandelbrot and Julia Sets – Investigate relationships between these two fractal sets. |
![Fractals - Polygonal icon](images1/icons/polygonfract_n.gif) |
Fractals - Polygonal – Change the parameters to create a new fractal. |
![Geoboard icon](images1/icons/geoboard_n.gif) |
Geoboard – Use geoboards to illustrate area, perimeter, and rational number concepts. |
![Geoboard - Circular icon](images1/icons/circgeoboard_n.gif) |
Geoboard - Circular – Use circular geoboards to illustrate angles and degrees. |
![Geoboard - Coordinate icon](images1/icons/coordgeobd_n.gif) |
Geoboard - Coordinate – Rectangular geoboard with x and y coordinates. |
![Geoboard - Isometric icon](images1/icons/isomgeob_n.gif) |
Geoboard - Isometric – Use geoboard to illustrate three-dimensional shapes. |
![Golden Rectangle icon](images1/icons/goldenrectangle_n.gif) |
Golden Rectangle – Illustrates iterations of the Golden Section. |
![Great Circle icon](images1/icons/globe_n.gif) |
Great Circle – Use a 3D globe to visualize and measure the shortest path between cities. |
![How High? icon](images1/icons/howhigh_n.gif) |
How High? – Try your hand at the classic Piagetian conservation of volume test. |
![Ladybug Leaf icon](images1/icons/ladybugleaf_n.gif) |
Ladybug Leaf – Program a ladybug to hide behind a leaf. |
![Ladybug Mazes icon](images1/icons/ladybugmaze_n.gif) |
Ladybug Mazes – Program a ladybug to move through a maze. |
![Pattern Blocks icon](images1/icons/patternblocks_n.gif) |
Pattern Blocks – Use six common geometric shapes to build patterns and solve problems. |
![Pentominoes icon](images1/icons/pentominoes_n.gif) |
Pentominoes – Use the 12 pentomino combinations to solve problems. |
![Platonic Solids icon](images1/icons/platonicsolids_n.gif) |
Platonic Solids – Identify characteristics of the Platonic Solids. |
![Platonic Solids - Duals icon](images1/icons/platonicduals_n.gif) |
Platonic Solids - Duals – Identify the duals of the platonic solids. |
![Platonic Solids - Slicing icon](images1/icons/slicesolids_n.gif) |
Platonic Solids - Slicing – Discover shapes and relationships between slices of the platonic solids. |
![Polyominoes icon](images1/icons/polyominoes_n.gif) |
Polyominoes – Build and compare characteristics of biominoes, triominoes, quadrominoes, etc. |
![Pythagorean Theorem icon](images1/icons/pythagorean_n.gif) |
Pythagorean Theorem – Solve two puzzles that illustrate the proof of the Pythagorean Theorem. |
![Space Blocks icon](images1/icons/spaceblocks_n.gif) |
Space Blocks – Create and discover patterns using three dimensional blocks. |
![Tangrams icon](images1/icons/tangrams_n.gif) |
Tangrams – Use all seven Chinese puzzle pieces to make shapes and solve problems. |
![Tessellations icon](images1/icons/tesselations_n.gif) |
Tessellations – Using regular and semi-regular tessellations to tile the plane. |
![Tight Weave icon](images1/icons/tightweave_n.gif) |
Tight Weave – Visualize the creation of the Sierpinski Carpet, an iterative geometric pattern that resembles a woven mat. |
![Transformations - Composition icon](images1/icons/comptransform_n.gif) |
Transformations - Composition – Explore the effect of applying a composition of translation, rotation, and reflection transformations to objects. |
![Transformations - Dilation icon](images1/icons/dilation_n.gif) |
Transformations - Dilation – Dynamically interact with and see the result of a dilation transformation. |
![Transformations - Reflection icon](images1/icons/reflection_n.gif) |
Transformations - Reflection – Dynamically interact with and see the result of a reflection transformation. |
![Transformations - Rotation icon](images1/icons/rotation_n.gif) |
Transformations - Rotation – Dynamically interact with and see the result of a rotation transformation. |
![Transformations - Translation icon](images1/icons/isomettransform_n.gif) |
Transformations - Translation – Dynamically interact with and see the result of a translation transformation. |
![Triominoes icon](images1/icons/triomino_n.gif) |
Triominoes – Manipulate the puzzle pieces and find multiple solutions. |
![Turtle Geometry icon](images1/icons/turtlegeometry_n.gif) |
Turtle Geometry – Explore numbers, shapes, and logic by programming a turtle to move. |
![Attribute Trains icon](images1/icons/attributetrain_n.gif) |
Attribute Trains – Learn about shape and color patterns of by completing trains of blocks. |
![Converting Units icon](images1/icons/convunit_n.gif) |
Converting Units – Use a simple system for converting units. |
![Fill and Pour icon](images1/icons/fillnpour_n.gif) |
Fill and Pour – Solve puzzles requiring you to fill and pour containers. |
![Geoboard icon](images1/icons/geoboard_n.gif) |
Geoboard – Use geoboards to illustrate area, perimeter, and rational number concepts. |
![Geoboard - Circular icon](images1/icons/circgeoboard_n.gif) |
Geoboard - Circular – Use circular geoboards to illustrate angles and degrees. |
![Great Circle icon](images1/icons/globe_n.gif) |
Great Circle – Use a 3D globe to visualize and measure the shortest path between cities. |
![How High? icon](images1/icons/howhigh_n.gif) |
How High? – Try your hand at the classic Piagetian conservation of volume test. |
![Ladybug Leaf icon](images1/icons/ladybugleaf_n.gif) |
Ladybug Leaf – Program a ladybug to hide behind a leaf. |
![Ladybug Mazes icon](images1/icons/ladybugmaze_n.gif) |
Ladybug Mazes – Program a ladybug to move through a maze. |
![Money icon](images1/icons/money_n.gif) |
Money – Learn about money by counting and making change. |
![Pattern Blocks icon](images1/icons/patternblocks_n.gif) |
Pattern Blocks – Use six common geometric shapes to build patterns and solve problems. |
![Tangrams icon](images1/icons/tangrams_n.gif) |
Tangrams – Use all seven Chinese puzzle pieces to make shapes and solve problems. |
![Time - What Time Will It Be? icon](images1/icons/clock_n.gif) |
Time - What Time Will It Be? – Answer questions asking you to indicate what time it will be before or after a given time period. |
![Bar Chart icon](images1/icons/barchart_n.gif) |
Bar Chart – Create a bar chart showing quantities or percentages by labeling columns and clicking on values. |
![Box Model icon](images1/icons/boxmodel_n.gif) |
Box Model – Randomly selects and displays draws from a box. |
![Box Plot icon](images1/icons/boxplot_n.gif) |
Box Plot – Use this tool to summarize data using a box plot graph. |
![Coin Tossing icon](images1/icons/cointoss_n.gif) |
Coin Tossing – Explore probability concepts by simulating repeated coin tosses. |
![Hamlet Happens icon](images1/icons/hamlet_n.gif) |
Hamlet Happens – Verify that rare events happen by drawing letters from a box. |
![Histogram icon](images1/icons/histogram_n.gif) |
Histogram – Use this tool to summarize data using a histogram graph. |
![Loan Calculator icon](images1/icons/savingsnloan_n.gif) |
Loan Calculator – Explore how to pay off a loan, and how interest affects payment. |
![Pie Chart icon](images1/icons/piechart_n.gif) |
Pie Chart – Explore percentages and fractions using pie charts. |
![Savings Calculator icon](images1/icons/savingsnloan_n.gif) |
Savings Calculator – Explore how savings, with or without regular deposits, grow over time. |
![Scatterplot icon](images1/icons/scatterplot_n.gif) |
Scatterplot – Plot multiple data points in two dimensions and determine correlation. |
![Spinners icon](images1/icons/spinner_n.gif) |
Spinners – Work with spinners to learn about numbers and probabilities. |
![Stick or Switch icon](images1/icons/makeadeal_n.gif) |
Stick or Switch – Investigate probabilities of sticking with a decision, or switching. |