Consider this statistic: on average, before graduating from high school, every kid in America sits in class without their regular teacher for what adds up to most of a school year.
That's according to a Harvard analysis of teacher absence data. But what happens if there aren't enough substitutes?
Hundreds of school districts in Pennsylvania are turning to private staffing companies to solve a substitute teacher shortage. Laura Benshoff of Here & Now contributor WHYY reports.
Laura Benshoff, education reporter for WHYY in Philadelphia. She tweets @LEBenshoff.
This segment aired on October 28, 2016.