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    Featured Lesson Plan

    You asked, and we listened—improve arithmetic and reasoning skills using this brand new pre-K–grade 1 lesson!

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    Featured Mobile Game

    We've released Equivalent Fractions back into the iTunes store—download it today!

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    Featured Interactive

    Pre-K–Grade 5: Become confident in facts up to 12 x 12 using visual models that stress the conceptual aspects of multiplication.

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    Featured Brain Teaser

    Ask a friend to pick a number from 1 through 1,000. After asking him ten questions that can be answered yes or no, you tell him the number. What are those questions? 

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Test your skills.
Tease your brain.

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Challenge students and mathematics enthusiasts with these puzzles.

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Read and share experiences of how people have used Illuminations’ resources.