First, what did not correlate with improved test scores: per-pupil expenditures, class size, teacher certification, and teacher advanced degrees. In summary, the school's resources.
Instead, what did correlate with improved test scores: teacher feedback, data-driven instruction, tutoring, instructional time, and high expectations. In summary, the school's culture.
After recognizing that correlation does not prove causation, Weissmann's conclusion is balanced:
It's easier for schools to offer intensive tutoring, extra classroom time, and teacher coaching when there's enough money to go around. (snip) But Fryer's findings show that money alone isn't enough. Neither are sterling teaching credentials. It's what you do with them that makes a difference for students.
