The problem with how a subject is taught

Because we can increase our working memory within a subject, we can create new chunks and master very complicated ideas. The perceived difficulty is often the way subjects are taught. Only the smarter students will remain, the higher you go in maths or science. This leads teachers to skip over "trivial" steps, leading you feeling like you can't master it.

Solutions are for teachers to slow down the class or for the student to slow down the class using, for example, the Feynman Technique.