Impact of First Quarter Senior Grades

I’m doing pretty well this year with the exception of AP Comp Sci in which I have a B+. This will likely be my quarter grade for the class. How bad will this look to the schools that I’m applying early to (MIT, Caltech, UChicago)? This is my first grade lower than an A for my high school career, and I am taking 4 other AP classes this year. I should be able to bring the Comp Sci grade up to an A- and possibly an A by the end of the semester.

Fret not. They will see all your classes and how you have been doing over your whole HS career and the level of classes you have been taking.