How much would a B- and a B+ affect my chances for the Ivies/Stanford/MIT?

Ahaha just joking, but seriously though, probably not. It’s not as if you have Bs spread out all across the board, like 3 Bs each year. Whether you are a 3.8 UW GPA with the stellar level of ECs you show (3 internships? o.0) or with a 4.0 UW GPA with a International Math Olympiad Gold Medal, applying for IVYs are almost always a crapshoot.

I mean there was an African American girl at my school who got accepted into UPenn, and she had around a 3.7-3.8 UW GPA, but the courses were pretty rigorous and she was also a regional and I think nationally ranked athlete.