<p>jzhu214: I go to Binghamton and am not a science major. Professors will ALWAYS teach lecture courses. Discussion sections and labs, however, are typically led by an undergraduate or graduate TA. These discussion sections do not cover any new material. They often go over homework or review things already taught in class by the professor. They’re there as an extra resource for our students and to ensure that all large classes are also meeting in smaller groups so students have extra time to ask any questions that they didn’t get answered in lecture.</p>
<p>~Rob</p>