Are deeper teacher shortages in the future?

The NYTimes reports:

In California, the number of people entering teacher preparation programs dropped by more than 55 percent between 2008 and 2012, according to the California Commission on Teacher Credentialing. Nationally, the drop was 30 percent between 2010 and 2014, according to federal data. Alternative programs like Teach for America, which will place about 4,000 teachers in schools across the country this fall, have also experienced recruitment problems.

New Jersey, like every other state, has problems with teacher retention.

Dr. [Daniel] Katz says historically a third of teachers leave the profession before five years. In urban areas he says it’s even higher than 50 percent, with students in those urban areas frequently getting the blame for causing teacher burnout. But he says a recent Harvard University study faults working conditions and lack of support.