"Mandatory retention" requires third-graders who aren't proficient in reading to repeat the grade. The policy started in Florida 17 years ago. Now 19 states have adopted it.

"Mandatory retention" requires third-graders who aren't proficient in reading to repeat the grade. The policy started in Florida 17 years ago.

Now 19 states have adopted it. https://t.co/UKSW1WUF0A

— NPR (@NPR) July 13, 2019