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At the time of writing, the app is available for Android on Google Play here ! UPDATE (12/29/2019): Now available on iOS as well here One of my fondest memories from high school were a set of re-takeable quizzes from pre-calculus collectively called “Speed Trig”. The idea was that you had to solve a battery of rote trig problems under time pressure and graded on an all or nothing basis. While…
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