Authoritarians go after data. The president has already started.

Some leaders reduce our math crisis to two words: test scores. For decades, hopes of progress were dashed by flat to declining scores. Full-bore panic about fading global competitiveness. Urgent calls ...

Math scores in the U.S. have been so bad for so long that teachers could be forgiven for trying anything to improve them. Unfortunately, many of the strategies they’re using could be making things ...