District education startup Quad Learning Inc. could be best be described in two ways. The first was that it was a great idea, connecting students to two-year schools and getting them into four-year colleges and universities though mentoring and content. The second? That it was simultaneously a hard way to make money, according to LeRoy Pingho, the last CEO to lead the startup before its acquisition by Wellspring International Education at the end of October. It was a less than stellar end for...