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    NRICH
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    In this number puzzle/trick, learner #1 thinks of a number between 1 and 63. Learner #2 shows learner #1 six cards and asks them whether the cards contain their number. Learner #2 uses this...

    1 cent - $1 per group Ages 14 - 18 5 to 10 minutes
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    NCTM Illuminations
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    In this math meets engineering activity, learners make paper airplanes and explore attributes related to increasing flight distances. Each learner collects data from three flights of the airplane...

    1 cent - $1 per group Ages 8 - 11 1 to 2 hours
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    Children's Museum Of Houston
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    In this math activity, learners play a game using their number sense to make the highest or lowest number possible. Use this activity to explore place value and/or decimals. This activity guide...

    1 cent - $1 per group Ages 8 - 11 10 to 30 minutes
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    The Exploratorium
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    This is a lesson plan for an activity in which learners, playing the role of archeologists, use math concepts about number bases to decipher the Dresden Codex, an ancient Mayan document. The lesson...

    1 cent - $1 per group Ages 8 - adult 2 to 4 hours
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    NRICH
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    In this math game, learners throw dice and place the numbers in one of four boxes. Learners repeat this three more times and the learner with the largest four digit numbers is the winner. Learners...

    1 cent - $1 per group Ages 8 - 14 5 to 10 minutes