College is a different dynamic from a middle/high school classroom, but I don’t remember 95% of the material from my college engineering classes anyway, it’s the problem solving and information finding that I’ve retained and have helped me do the things I do. I remember the stuff from the classes that taught me the material in an engaging way though.
"Just do it right and it won't be a problem." This is not an actionable plan. What is engaging? Who gets to decide that? The teacher? The students? The parents? How do deal with certain kids finding different approaches more or less engaging? How do you expect a teacher to curtail their teaching approach to dozens of children at the same time?