Lee J. Cronbach

Lee J. Cronbach was a very smart man who studied how people learn things in school and how to measure how much they have learned. He was like a detective trying to find clues about what people know and how they think. He also figured out how to make tests that can tell teachers how well their students are doing in class, like a report card. He was really good at math and statistics to help him figure these things out. People still use his ideas today to help students learn better and for teachers to know if they are teaching well.