4 O'clocks?

<p>I saw them on the academic calander. what are they?</p>

<p>midterm exams</p>

<p>why are there two sets of them per a semester in addition to finals?
<a href=“http://www.lehigh.edu/~inrgs/calendar2.shtml[/url]”>http://www.lehigh.edu/~inrgs/calendar2.shtml&lt;/a&gt;&lt;/p&gt;

<p>because you take two 4 o’clock exams in addition to a final in most classes - it is up to the professor to dictate the actual test requirements.</p>