The good news is that US high school graduation rates are going up. The bad news is that researchers don’t know why.

The good news is that US high school graduation rates are going up. The bad news is that researchers don’t know why. https://t.co/VW4Vm82p9l pic.twitter.com/qlbVeGA7iJ

— Brookings (@BrookingsInst) May 19, 2017