Does anyone have any experience or thoughts on after school math enrichment programs like Russian School of Math or Mathnasium? The big thing now seems to be teaching kids the fundamentals of logic and reasoning.

Especially to any elementary school teachers in the hive - is it worth it? Or is it better to get some workbooks and help my 1st grader on my own? He is pretty good at computation but doesn’t seem to grasp/can’t articulate the “why” behind the answer.