I'm trying out the Decibels app on my iPhone. I like the idea of it.
Maybe I can use it in class to measure how loud the students are? (jk)
Mathtrain.TV:Ep.127, Visual Look at Area of a Circle
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Let’s take a visual look at the area of a circle. Part of the
student-created tutorial project at Mathtrain.TV. Mathtrain.TV is a free,
educational “kids t...
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