A lot of the stats coming out about Coronavirus directly compare countries' death tolls and infection rates, looking to see which nation has been hit hardest and who's reacted the best. The problem is that Trump & Johnson (who lead the...

In this video, the teacher explains how to prove the formula for the circumference of a circle by dissecting the circle and making comparisons. The students are guided through the process of unrolling the circle to see how the...