<p>Actual rules vary among schools. Harvard in fact allows you to send any scores you want and withhold those you don’t. That it says it considers scores from previous administrations simply means you can send any scores you took any time in high school. </p>
<p>Penn, for admission, accepts the SAT plus two SAT IIs, or alternatively to both of those, the ACT. If you send any SAT or SAT IIs you must send all SATs and SAT IIs. However, if you send ACT, you need to provide all ACT scores but don’t need to send any SAT or SAT II scores.</p>