I'm not so sure about the spaced repetition side of things. Out of curiosity I've just opened MathAcademy after not doing any lessons for a little over two weeks and all choices I have are for new lessons. I expected to see an ocean of reviews instead, since surely I'm on the verge of forgetting a lot of what I've learned.
Other than that, I have very high hopes for the future of MA. It's by far the best platform I've found for actually learning math.
Regarding spaced repetition, keep in mind the following:
1. New tasks are selected only as you complete existing tasks (so if you come back after 2 weeks, you need to complete some existing tasks from 2 weeks ago to get new tasks selected based on your knowledge profile right now).
2. We are often able to implicitly knock out due reviews with new lessons. We're not just doing plain vanilla spaced repetition. We're doing a highly efficient novel version of it that we call Fractional Implicit Repetition (FIRe). I have a writeup on this that gained some traction on HN recently: https://news.ycombinator.com/item?id=40954571
It will mix in the reviews too, don't worry. It's actually a bit clever with those and new tasks which rely on previous knowledge points will count as a small amount of review for those previous tasks too. It's not split into purely-new and purely-review.
>I'm not so sure about the spaced repetition side of things.
From what I could read, many studies have shown this is an effective technique. From my personal experience it only works if you understand what you are trying to remember. For example, trying to memorize some complicated formulas that you don't understand is doomed to fail.
I think you misunderstand. They aren't doubting SRS. They're doubting that MathAcademy is doing it. They logged in after 2 weeks and had no reviews waiting.
Just a heads up that there's an explanation for this; I responded to the original comment (https://news.ycombinator.com/item?id=41556644) but I'll also paste here in case anyone misses it:
1. New tasks are selected only as you complete existing tasks (so if you come back after 2 weeks, you need to complete some existing tasks from 2 weeks ago to get new tasks selected based on your knowledge profile right now).
2. We are often able to implicitly knock out due reviews with new lessons. We're not just doing plain vanilla spaced repetition. We're doing a highly efficient novel version of it that we call Fractional Implicit Repetition (FIRe). I have a writeup on this that gained some traction on HN recently: https://news.ycombinator.com/item?id=40954571
Other than that, I have very high hopes for the future of MA. It's by far the best platform I've found for actually learning math.