In my PE class, we had our last day swimming, and I participated every day but for some reason my I lost about a third of my points in participation. I tried emailing my teacher, but he didn't reply. I really don't want a misunderstanding to be the reason why my grade point average had dropped. Is there anything that I could do, today is the end of the card marking period and my teacher put the grades up today. I don't want to accept this without having a good enough reason. I'll try talking with him on Monday, but will it be too late to make a difference?