> To become proficient with derivatives, you need to teach yourself by taking a lot of derivatives. But... wait... you are taking derivatives, you're not doing

> To become proficient with derivatives, you need to teach yourself by taking a lot of derivatives. But... wait... you are taking derivatives, you're not doing something special that can be called "learning". Actually, that is the process of learning. Doing it yourself and checking your results is part of a feedback loop essential in learning anything. That's why the answers in the back of most math textbooks are so important, if you can't tell you've got the problem wrong, then you have "taught" yourself something wrong.