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Twelve interactive online geometry programs: WebPisces (compute implicitly defined curves in the plane); Build a Rainbow (a lab that examines a mathematical model of light passing through a water droplet); QuasiTiler...
What is the difference between the arithmetic 3+5 = 5+3 and the algebraic a+b = b+c? One is a specific fact, another is a pattern valid in a multitude of situations. While arithmetic may hint at some regularities,...
These roughly 100 lesson plans are related to mathematics technology and are provided by the nonprofit Education Development Center. The lesson plans are designed to help students develop both deep conceptual...
These roughly 200 lesson plans are related to mathematical problem solving and are provided by the nonprofit Education Development Center. The lesson plans are designed to help students develop both deep conceptual...
9th Grade Math Practice Questions to test addition, multiplication, wordproblem skills, and basic algebraic skills. Includes answers and explanations. From the Proficiency Building Activities of the NASA Lewis Research...

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