Thats actually really good but I just want to make one recomendation. My recommendation is that you should change the very last sentence and make it say "I would like to know my current grade" and not "what will be my current grade," I think this because the term "will" is used for future-tense and the term "current" is used for present-tense, so to me it doesn't make sense for both of the tenses to be in the same sentence. But either way your email is really good. :)
