Speaking of teacher licensure...

...enrollment in teacher preparation programs is down:

Nationwide, enrollments in university teacher-preparation programs have fallen by about 10 percent from 2004 to 2012, according to federal estimates from the U.S. Department of Education's postsecondary data collection...Separate state-by-state enrollment data collected under Title II of the Higher Education Act, meanwhile, suggest that the decline in teacher-preparation enrollments has accelerated in recent years, particularly since 2010. 

California lost a full 53% last year.