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Solomon Xie's Experience
Top Pro
•••
Each lesson is too long but the teacher is great in explaining things See More
For every lesson, it has a "worksheet" where you can attempt to solve problems in the set. And for each problem, there's a "check" button where you can see if it's right or not, and also there're "hint" and "solutions" for each problem. The website also uses the "smart textbox" for entering equations conveniently like what Khan academy does. See More