 Each of these statewide studies, conducted between 2009 and 2012, found that corps members often help their students achieve academic gains at rates equal to or larger than those for students of more veteran teachers.The findings show that TFA teachers are in general more effective, according to student exam scores, than traditional teachers that would be in the classroom in their stead.These estimates demonstrate that, compared with traditional teachers with similar levels of experience, TFA teachers have strong positive effects on student test scores.