I keep losing my points
I'm revising some past maths to keep increasing my level. For example 1 month ago I completed 3rd grade math and now again, it says 73 %. Seems like every often, (like very often) Khan Academy makes you lower the 100 % status on one course. It is very difficult to get 100 % points on a course and so I don't understand the strategy behind this. It's demotivating because it makes the people not want to keep up, because they have to redo the stuff they have demonstrated they know. Getting more than once 30 exercises correct in a row is not an easy duty. At least for me. So please clarify my doubts and tell me if this is a problem with my account or is actually what I think it is; a feature by Khan Academy that restarts or subtract the progress of students.
Regards,
Paûlos.
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