alt Hacker News> It takes years to sort things out and by then the approach of the day has moved on.
What? Good approaches, definitionally, have quite a lot of staying power. This is true in most fields but especially in education where, it turns out, we don't really figure out net new approaches that are much better than the last ones very frequently.
New approaches are tried in education all the time. What constitutes "good" is subjective and might take years to really play out. Education is like economics... so many variables and changing starting conditions