Is there any long-term data /analysis that shows one type of curriculum or teaching is better than another?

It seems like my school district is changing curricula or teaching methods about every 3-to-4 years based on new research. But it also seems like the outcome is the same, regardless of curriculum or methods. Why do schools change so often and is it really better?

Submitted November 25, 2019 at 08:32AM by alltime_pf_guru https://ift.tt/2OhiWL6