Aug. 4—Before a crowd of their peers, dancers were asked to perform their routine they practiced all the week, but with a catch: perform all of it, then 30% of it and finally 70% of it. It was a dance ...

This is the second in a two-part series. Part one can be found here. The debate over what early math should look like and what should be included in the Common Core State Standards for math is one of ...