Good English Language Arts teachers raise students’ performance in future years — in English and math, writes Daniel Willingham. However, good math teaching doesn’t carry over to English performance. Looking at large data sets in New York City and Miami-Dade, researchers confirmed that 25 to 30 percent of value-added measures persist into the next year in both math and English, writes Willingham. Forty-six percent of the VAM effect carried over to math achievement in Miami-Da