If you flip a quarter many times, it should land heads up just about as often as it lands tails up, assuming the coin is fair. But with so many different state designs, it's not clear that all U.S. quarters are fair. Help us check by taking a few moments to flip some quarters and report the results below.
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Applications for Cohort 4 are open!

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The SciStarter Ambassador Program offers FREE training to volunteers ready to make an impact in their communities.

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