By far the most memorable college class I took was an advanced electronics lab where I ended up as the "unofficial TA". I was by no means an expert but I guess I got a reputation for picking the material up quickly and being able to help guide my classmates to the same understanding. It was honestly a little stressful but in retrospect being pushed to internalize what I was learning deeply enough to be able to explain it clearly to fellow students was highly beneficial to my own learning process. I was never all that interested in grad school or academia, but the meta-lesson of that course has stuck with me in guiding career choices... I tend to seek out opportunities for consulting or mentoring type roles knowing that they will help further my own learning as well.