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Standard deviation & bell curves. Some people do not think of this anymore. They expect everyone to be at the top.

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The central limit theorem, explained with bunnies and dragons

Animator Shuyi Chiou and the folks at CreatureCast give an adorable introduction to the central limit theorem – an important concept in probability theory that can reveal normal distributions (i.e. bell curves) across data that does not appear to fit a normal distribution curve.

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Normal Distribution, Standard Deviation, Z-Scores Task Cards

Students will practice calculating and interpreting z-scores, normal distribution, and standard deviation in real world contexts by working through these 20 task cards. These are challenging and diverse questions that require students to read carefully. 8-12 $

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Math Monday: Make a Marble Run

This is an interesting way to discover probability distribution. The probability that a marble dropped from above will land in a given slot is clearly visible.

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