I wouldn’t send a B+ if not required.

If other applicants at your high school historically sent their quarter grades to ED Northwestern, then you would send them too.

Only if they’re better or same as what has been sent to date

DC applied ED to Northwestern. Quarter grades came out after the ED deadline - all As and one B+ (missed an A by .5) in all AP and IB classes. Should DC send them even though they aren’t required to submit quarter grades? Semester grades are required but won’t come out until after ED decision.