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    Featured Lesson Plan

    Grades 3–5: Investigate fractional parts of the whole and use translations, reflections, rotations, and line symmetry to make four-part quilt squares.

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    Featured Mobile Game

    Pre-K–Grade 2: Use visualization, spatial reasoning, and geometric modeling to build patterns or recreate one.

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  • ConicSectionExplorer IMAGE ForRotatingBanner

    Featured Interactive

    Grades 9–12: Explore the different conic sections and their graphs. 

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  • ASpiral IMAGE BT143RotatingBanner

    Featured Brain Teaser

    Move 4 of the 35 matches to form 3 squares.

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