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|Spreadsheets as laboratories where students can "become a scientist who poses a question, builds a model, collects data, and asks 'What if ...?'" Freely downloadable Excel files that emphasize student choice, challenge, and creativity range from place value and basic operations, to carbon dioxide change and functions, to fractals and curve stitching.|
|Levels:||Elementary, Middle School (6-8), High School (9-12)|
|Math Topics:||Arithmetic/Early Math, Euclidean Plane Geometry, Pre-Calculus|
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