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  • How do you count tigers you can't see?

    7th Grade · Sampling · about 3 min

    CCSS 7.SP.A.1 · CCSS 7.SP.A.2

  • Why is the Eiffel Tower taller in summer?

    7th Grade · Proportional relationships · about 3 min

    CCSS 7.RP.A.2.b · CCSS 7.RP.A.2.a

  • A rope around the Earth

    7th Grade · Circles · about 2 min

    CCSS 7.G.B.4

  • Time is a ruler

    7th Grade · Proportional relationships · about 2 min

    CCSS 6.RP.A.3.b · CCSS 7.RP.A.2.b

  • The shrink ray problem

    7th Grade · Percent change · about 2 min

    CCSS 7.RP.A.3

  • Why does Greenland look as big as Africa?

    7th Grade · Scale drawings · about 2 min

    CCSS 7.G.A.1

  • How fast can a town warm up?

    7th Grade · Negative numbers · about 3 min

    CCSS 7.NS.A.1.c · CCSS 7.NS.A.3

  • Why is a spaghetti bridge full of triangles?

    7th Grade · Triangles · about 3 min

    CCSS 7.G.A.2

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