REUTERS/Yuri GripasBetsy DeVos, the woman President-elect Donald Trump chose to lead the US Department of Education, sparred with some lawmakers during her confirmation hearing on Tuesday. At one point, DeVos appeared to get stuck on a question asked by Sen. Al Franken of Minnesota. Franken asked DeVos to clarify her position on measuring student progress — specifically, the debate between proficiency versus growth. DeVos asked for clarification after first conflating the meanings of the two concepts. "This is a subject that has been debated in the education community for years," Franken told DeVos.