Doubts Cast on Math, Science Teaching Lures

Few strategies for luring more students and working adults into math and science teaching have proved as popular among elected officials as financial incentives, which try to make one of the least appealing aspects of the job—low pay—a little less daunting.

Lawmakers on Capitol Hill are considering a number of bills that would expand existing incentives, such as scholarships and loan forgiveness for aspiring educators, and create new monetary inducements. Dozens of states, meanwhile, already offer their own incentives for teachers in subjects with shortages, including mathematics and science.

But those who have studied financial incentives say evidence is scant that they are attracting substantial numbers of college students and career-changers to math and science teaching, despite years of...