So, making no excuses, I messed up pretty badly in the first quarter of my senior year. I slacked off a lot and my grades definitely show it. How much will this affect me in the admissions process?
AP Chem: 72
Physical Education: 91
AP Gov & Politics: 83
AP Economics: 87
AP English: 88
AP Calc AB: 85
Intro to social science research: 93
I am applying to:
Boston College
Boston University
Cornell University
Duke University
Emory University
Johns Hopkins University
Bing
Stony
UPENN
UNC
University of Rochester
Washington University in St. Louis
Sophie Davis
Regular decision for all of them. I still have my second quarter to improve but with my poor grades first quarter, I’ll definitely end up with a B and probably a C for Chem. 
Depends on what your overall GPA is when you factor those grades in.
Do quarter grades show up on your transcript? What was your GPA before?
Considering it is part of your GPA, arguably the most important factor for college admissions, it will hurt you. As to how much, hard to say.
@anxiousenior1 @rdeng2614 I believe it’s just final year grades on the transcript along with regents scores if applicable. And my UW gpa was about a 3.824 and my W was about a 4.34
If this is of any importance, I received a 34 on the ACT and a 1380/2170 on the SAT
Act was single sitting
Sat was two sittings but only a 50 point difference from my first single sitting
If it’s just final year grades, then it won’t matter at all. Colleges only really care about what shows up on the transcript.
@rdeng2614 yeah but the first semester (the first two quarters) will show up, correct? And it definitely won’t be stellar so does that really hurt me in admissions?
And I was ranked 39/475 so top ten percent
Colleges looking for mid year reports will see your grades.
All colleges will want your final transcript after high school graduation. Admission offers are typically conditional on completing previously reported in-progress courses with sufficiently high grades. What “sufficiently high grades” are depends on the college. Some specify actual grade and GPA minimums, while others vaguely state “we expect you to continue your previous academic performance”.
If you look in past threads, spring and early summer every year tend to have lots of “will my admission to [college] be rescinded?” posts from students who did significantly worse in senior year than previously.