<p>Why doesn't Princeton offer summer classes? I find this bizarre because nearly every other university runs a summer school. </p>
<p>Is it common for students to earn course credit over the summer?</p>
<p>They do. It's called FSI and only for incoming freshmen who have enormous responsibilities upon starting school (usually sports of some kind).</p>
<p>You can get course credit at a number of other institutions if you so desire. Just make sure the proper forms are filled out in time.</p>