Comedian Louis C.K. recently went on a social-media rant about the Common Core State Standards and testing, as my colleague Catherine Gewertz blogged this week. Within the Twitter barrage of ...

Count forwards and backwards in eights using this counting stick. If we know the answer to a multiplication number sentence or multiplication fact we can work out the answer to an unknown number ...

Earlier this year, a first-time academic author published a new mathematical study in the journal Research in Number Theory. The twist? The researcher, Christopher Havens, is also serving a 25-year ...