Politico reports the US is teetering on the edge of a teacher shortage crisis, and if nothing is done to stop it, the country could be grappling with a shortage of more than 100,000 teachers annually by 2025, according to a new report released by the Learning Policy Institute, a California-based think tank launched last year by Linda Darling-Hammond. After a surplus of teachers were laid off during the recession, the economy began to improve and the demand for teachers rose. But attrition is high, enrollments in teacher prep programs are low and student enrollments are climbing, leading to a decrease of 240,000 teachers over the last five years.