Compare four sets of pattern blocks. Use pattern blocks to make different shapes. Warm up with a Mystery Math Mistake to tell whether Dotson's 10-frames represent a number less than his focus number.

In the third century BCE, Apollonius of Perga asked how many circles one could draw that would touch three given circles at exactly one point each. It would take 1,800 years to prove the answer: eight ...

You might not need exotic manufacturing techniques to produce custom-shaped objects. If Harvard scientists have their way, you could start with little more than a sheet and some math. They've created ...