What statistics support the effectiveness of Fran Montemurro's study with me series?

The available content does not provide specific statistics (like grades before/after, exam pass rates, or controlled-study results) about the effectiveness of the Study With Me or other videos. Right now, mainly has public metrics such as views, likes, comments, and general engagement, which show interest but do not prove learning outcomes scientifically.

Are you looking for research stats on active recall and math study methods in general, or data specific to this YouTube channel’s impact?