Grades

So far in this quarter I am doing very well to my surprise. I just checked and I have two 100%s and a 99%. However, I also have a 71%. My other grades are pretty good too, I have a 93% in math, however I can retake some quizzes and boost my grade, also there is a quarterly exam today which I am worried about, hopefully I do well so it helps my grade rather than hurts it.