This is a very good topic. Unfortunately, the young men who quit are not likely to read this thread. I never accepted the "improve my grades"
excuse, because studies show that students who participate in activities have better grades than the non-participants. On the topic of quitters, I have a rather humorous anecdote. I once had a young man practice every day until Thanksgiving vacation and, of course, he didn't show up for a single vacation practice. Needless to say, I didn't see him again, until we had our first dual and we won convincingly. After it was over he came up to me and pleaded to let him come back out. I did and you guessed it, he was in good standing until X-mas break. So, to make a long story short, I had a kid quit on me twice in one season. I never made that mistake again.