RE: Score Choice
I copied this from a CC post a couple of years ago. Info may be out of date so worth verifying.
The rules vary from college to college. For the ones you list:
Penn: requires all tests (SATs, SAT IIs and ACTs)
Cornell: requires all SATs and all SAT IIs; requires all ACTs if you submit any ACTs
Yale: requires either all SATs and SAT IIs or, alternatively, all ACTs (it accepts ACT in lieu of both SAT and SAT IIs)
Harvard, Princeton, Dartmouth, Brown, Columbia: accept score choice for all tests (SAT, ACT and SAT IIs)
NYU, USC, MIT, Gtech, UT (Austin), UVA, Michigan, Chicago, : accepts score choice for all tests
Carnegie Mellon: requires all SATs, or alternatively, all ACTs (if you submit both tests, all tests must be submitted); and then requires all SAT IIs if particular CMU college requires SAT IIs (not all the CMU colleges require SAT IIs)
UC Berkeley, UCLA: current rule is ambiguous. It requires all SATs if you send any one SAT but unclear whether that rule applies to ACT or SAT IIs
Stanford: requires both all SATs and all ACTs but you can send whatever SAT IIs you want to send
Caltech: accepts score choice for all tests but “strongly recommends” submitting all SAT and SAT II scores (many other colleges usually just say recommend rather than strongly recommend submitting all scores)
UIUC and University of Washington: accept score choice for SAT and ACT and do not use SAT IIs for admission.
Top schools that DO NOT Accept Score Choice:
UNIVERSITIES:
Carnegie Mellon University
Cornell University
Georgetown University
University of California campuses
University of Pennsylvania
Rice University
Stanford University
Yale University