The national shortage of highly qualified math and science teachers points to a need to focus more attention and resources on teacher preparation. However, physics faculty often have little time to spare for activities outside of traditional research and teaching. The National Science Foundation (NSF) has strongly supported teacher preparation efforts, primarily through the Directorate of Education and Human Resources. What may be lesser known is that the NSF "broader impacts" criterion opens the door for more conventional research proposals to include teacher preparation activities as well.