High Standards for High Achievement
Interactive Math Lessons

For helpful videos on just about any math subject, try this site http://www.khanacademy.org/ (Thanks to Amos for sharing this site!)

Try any of these interactives to help you practice a concept:
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Abacus - An electronic abacus that can be used to do arithmetic.

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Base Blocks - Illustrate addition and subtraction in a variety of bases.

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Base Blocks Addition - Use base ten blocks to model grouping in addition.

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Base Blocks Decimals - Add and subtract decimal values using base blocks.

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Base Blocks Subtraction - Use base ten blocks to model separation of groups in subtraction.

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Chip Abacus - Learn about carrying and digits using chips.

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Circle 0 - A puzzle involving adding positive and negative integers to sum to zero.

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Circle 21 - A puzzle involving adding positive and negative integers to sum to twenty one.

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Circle 3 - A puzzle involving adding positive real numbers to sum to three.

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Circle 99 - A puzzle involving adding positive and negative integers to sum to ninety nine.

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Color Chips - Subtraction - Use color chips to illustrate subtraction of integers.

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Conway's Game of Life - Discover the rules that determine change in these simulations.

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Diffy - Solve an interesting puzzle involving the differences of given numbers.

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Dueling Calculators - Visualize a dramatic simulation of the effect of propagating rounding errors.

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Factor Tree - Factor numbers using a tree diagram.

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Fibonacci Sequence - Explore the Fibonacci sequence and the golden ratio.

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Fraction Pieces - Work with parts and wholes to learn about fractions.

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Fractions - Adding - Illustrates what it means to find a common denominator and combine.

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Fractions - Comparing - Judge the size of fractions and plot them on a number line.

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Fractions - Equivalent - Illustrates relationships between equivalent fractions.

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Fractions - Rectangle Multiplication - Visualize and practice multiplying fractions using an area representation.

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Function Machine - Explore the concept of functions by putting values into this machine and observing its output.

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Golden Rectangle - Illustrates iterations of the Golden Section.

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Grapher - A tool for graphing and exploring functions.

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Mastermind - Use inference and logic to play a game and guess a hidden pattern of pegs.

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Money - Learn about money by counting and making change.

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Number Line Bars - Fractions - Divide fractions using number line bars.

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Number Line Bounce - Number line addition and subtraction game.

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Number Puzzles - Solve puzzles involving arranging numbers on a diagram so that they add up to a given value.

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Pascal's Triangle - Explore patterns created by selecting elements of Pascal's triangle.

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Peg Puzzle - Win this game by moving the pegs on the left past the pegs on the right.

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Percentages - Discover relationships between fractions, percents, and decimals.

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Sieve of Eratosthenes - Relate number patterns with visual patterns.

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Spinners - Work with spinners to learn about numbers and probabilities.

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Tangrams - Use all seven Chinese puzzle pieces to make shapes and solve problems.

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Tight Weave - Visualize the creation of the Sierpinski Carpet, an iterative geometric pattern that resembles a woven mat.

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Turtle Geometry - Explore numbers, shapes, and logic by programming a turtle to move.

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Venn Diagrams - Investigate common features of sets.

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Bar Chart - Create a bar chart showing quantities or percentages by labeling columns and clicking on values.

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Box Model - Randomly selects and displays draws from a box.

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Box Plot - Use this tool to summarize data using a box plot graph.

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Coin Tossing - Explore probability concepts by simulating repeated coin tosses.

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Hamlet Happens - Verify that rare events happen by drawing letters from a box.

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Histogram - Use this tool to summarize data using a histogram graph.

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Loan Calculator - Explore how to pay off a loan, and how interest affects payment.

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Pie Chart - Explore percentages and fractions using pie charts.

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Savings Calculator - Explore how savings, with or without regular deposits, grow over time.

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Scatterplot - Plot multiple data points in two dimensions and determine correlation.

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Spinners - Work with spinners to learn about numbers and probabilities.


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Bar Chart - Create a bar chart showing quantities or percentages by labeling columns and clicking on values.

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Box Model - Randomly selects and displays draws from a box.

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Box Plot - Use this tool to summarize data using a box plot graph.

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Coin Tossing - Explore probability concepts by simulating repeated coin tosses.

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Hamlet Happens - Verify that rare events happen by drawing letters from a box.

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Histogram - Use this tool to summarize data using a histogram graph.

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Loan Calculator - Explore how to pay off a loan, and how interest affects payment.

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Pie Chart - Explore percentages and fractions using pie charts.

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Savings Calculator - Explore how savings, with or without regular deposits, grow over time.

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Scatterplot - Plot multiple data points in two dimensions and determine correlation.

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Spinners - Work with spinners to learn about numbers and probabilities.

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Stick or Switch - Investigate probabilities of sticking with a decision, or switching.