I used Math Academy to relearn some math I’d forgotten since initially studying it decades ago. It covers pretty much an entire undergraduate curriculum. I was

I used Math Academy to relearn some math I’d forgotten since initially studying it decades ago. It covers pretty much an entire undergraduate curriculum. I was impressed with both the breadth of the courses and the efficiency gains from letting it do the scheduling and making sure I review topics just often enough to hold onto the skills. I’ve previously written about MA in more length here: https://news.ycombinator.com/item?id=32923684 https://news.ycombinator.com/item?id=32923684