Back in high school, I recall 12th grade second half of the year was called “flake-off for the rest of the year day”. Most of us already knew where were were going, and provided. I don’t think the admissions dept at the universities really cared. At least, the ivy league schools didn’t. Then again, most of us ended up just taking easy B or A classes in the second half.
Teachers were kinda cool because they understood, and a lot of them would just say screw it and give you the B—— instead of the C.
I remember senior year doing Calc B/C and the teacher first week, would flunk the majority of the students to weed them out….For the remainder of the year, he just kinda ended up giving everyone a B- for effort, and you only got an A if you really could do the work. Then again, everyone in his class got a 5 on the AP exam. You were really retarded if you didn’t.