In high school I would get to school early and practice my instrument or hang out. My band friend was in remedial algebra and failing and got up enough courage

In high school I would get to school early and practice my instrument or hang out. My band friend was in remedial algebra and failing and got up enough courage to ask for help with his homework. On the second problem I noticed that he couldn't read his own handwriting and asked him to write cleaner. He started getting the highest grades in the class and saying it was easy. When I started Algebra, I was trying to save paper by writing everything on one line ``A = B = C = D = answer`` which makes it hard to do things to "both sides" of the equation. I could mostly do the problems in my head but showing my work was impossible and it's easy to make trivial mistakes at any step that give you the wrong answer. My friend was using a whole sheet of paper per problem and showed me how to do it and then it got easy. My point is that if five minutes with a peer can fix trivial, fundamental issues with a student's approach, imagine what a trained teacher or professor could do on a short one-on-one session with each student?