Yeah, seems to me that the best way to actually learn material is to use it right after being introduced to it. It also eliminates potential pitfalls. If you'

Yeah, seems to me that the best way to actually learn material is to use it right after being introduced to it. It also eliminates potential pitfalls. If you're a student who misunderstood a professor about a math topic, and you do the homework without access to the answers, then you might do the entire problem set wrong. Even if you HAVE the answers, you might have no idea how the authors came up with the answer. Walking someone through a process they've participated in strengthens the overall teaching moment.