It taught how to memorize stuff: spaced repetition and semantic encoding. Spaced repetition is reviewing the thing at increasingly spaced intervals of time. Semantic encoding is coming up with connections to the idea. The wilder the better as that tends to be memorable.

The class taught some strategies for creativity such as use of analogies and trying to combine disparate ideas.

The class also taught cognitive biased, like loss aversion.

This class was life changing. It was also easy because the teacher applied the best practices she was teaching.

I would say something like that class is the basis for teaching people how to think.