I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those ...

Let’s keep things simple – this is basic math. Nothing scary. Just everyday calculations, a bit of geometry, some number patterns, and the kind of stuff you definitely learned in school at some point.

Black marker in hand, Nick Baar returned to the whiteboard. The newly minted math tutor wrote an equation for the eighth-graders in front of him: 25 x 199 The rules were simple: No calculators or ...