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Yes
Can you link me some? I'd honestly really appreciate it. I've used Khan academy but it was too sparse on exercises
Edit: spelling
It looks like they did away with the mastery system for the banner thing?
It's quite possible you're missing something from more fundamental maths. When i went back for an engineering degree i found through Khan academy that i needed to relearn 4th grade fractions. I just worked from there through every lessen from 4th grade up through calc 1 in one go. Took like 3 months but college level calc and above was a breeze with that strengthened foundation of knowledge.
Then when other students asked me for help i saw them having the same issues. It's really hard to tell an adult they need to work on 4th grade maths when they're studying for a calc exam. It's not their fault the classic education method gives you Swiss cheese knowledge.
I didn't struggle with any of it when I went through it, I just have subsequently found that I didn't retain many of the rules. The derivative's power rule is about the only rule I don't have to look up these days. I'd like an online resource that has a bunch of practice exercises to help drill that stuff into me.
I'm lamenting that Khan Academy had such a system in the past but it looks discontinued for a seemingly less useful one-and-done approach. Just throwing out the idea about gaps in knowledge in case.
One option would be to find additional textbooks. I believe my math courses used an open source one.
This looks similar maybe, I can't recall: https://openstax.org/subjects/math/
Thank you!