Susan Gilkerson, a math teacher and school bus driver, stood before a South Dakota education board and issued a warning. The proposed math standards the board was considering — just 36 pages, less ...

Model math standards produced by conservative education advocates helped spark a battle in South Dakota that could spread to other states.

Three leaves had been missing for more than a century. Researchers found one of them when they decided on a whim to check the archives of a French museum ...