Khan Academy saved my ass in calculus. My teacher sucked and I failed my first quiz. I was lost and was in summer accelerated. Watched Khan Academy videos and did a shit ton of practice problems and got an A on the next test. It's awesome IMO. Udemy is utter trash in comparison.
It's awesome. I learned Calculus from there before we had even started it in school in order to prepare myself. I aced the course completely thanks to Khan
Never tried any of their paid content but if it's anything like the free stuff they put up on YT it's probably worth a pretty penny. their free yt vids have helped me through quite a few of the heavier math classes I've had to take.
That being said I would assume you can find free video guides on just about any topic regarding the stuff usually taught in economic/finance classes - at bach level anyway. For that reason I would have a quick look around yt/google before applying for any paid courses.
Great service. I'm actually a donor to it because they are so awesome. I've done a fair amount of statistics and calculus activities on there for my own enrichment. Easy to understand and the gamification is pretty amazing.
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