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Core Math Tools is a downloadable suite of interactive software tools for algebra and functions, geometry and trigonometry, and statistics and probability. The tools are appropriate for use with any high school mathematics curriculum and compatible with the Common Core State Standards for Mathematics in terms of content and mathematical practices. Java required.

As I introduced a new geometry topic to my sixth grade class, one of my students immediately reacted to my mention of a new skill-classification of solid figures-by blurting out, "Again? We know everything about that. We learned it years ago."