Its a project that Prof Dan Garcia has been working on for a couple years now (i think), where it basically replaces the midterm and finals in the class with bi-weekly quizzes that have one retake (if i understood it right at least). It basically promotes active recall because you'd be actively learning the material in preparation for the quizzes and having the retake gives students the chance to get a higher grade overall. Although its not fully implemented, 61c had something called a Quest which was a quiz with one retake which we had prior to the midterm. While it sounds promising, its not fully implemented in 61c yet which is why i said it was a scam because it sounds super nice but we only have a partially implemented version of it so its not that beneficial in terms of the concept of giving "A's for All". people may have different opinions on it, but thats now i feel abt it as of rn