Teacher and Counselor Recommendations - do they work for every school?

Just wondering - do my teachers only need to write one recommendation that I can then send out to every school I apply to? Or are they going to need to write me an individual recommendation for Harvard, then another for XXX College, then another for YYY College, etc.

I’m using The Common Application if that is of any importance - thanks!

Teachers write one recommendation, so there is no tailoring by college; you can choose which teachers’ recommendations go to which schools.

If your teacher has more than one-year of experience at your high school, they should understand what they need to do. And, if they are clueless, the Common Application has instructions for recommendation writers: https://recsupport.commonapp.org/link/portal/33011/33014/Article/172/May-I-personalize-a-recommendation-for-my-student-s