This article is part of a series exploring the state of math education in Ohio. Brianna Swain does not remember learning much of anything in school while growing up in Columbus' Hilltop neighborhood.

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 ...

Ohio, like much of the country, has a math problem that teachers, college and district leaders, parents and others are urgently trying to solve.