Applied back on Nov. 1st for priority deadline. Submitted my ACT/SAT which was just a tad below the 25th percentile for CLA.
If I take the December SAT or ACT and improve, can I submit my scores again to be considered? Likewise, can I do the same for my transcript since quarter 1 just ended and my ranking improved?
Yes and yes. Especially if you happen to end up deferred because at that point they would want all current information. In that case, updated test scores and transcripts would be very welcome and could help your chances. But don’t wait to find out your admissions status - call the admissions office on Monday and get clarification as to whether they would use any Nov./ Dec. information to assess/re-assess your application for the early round.
Good luck!