<p>CS and Calc have a team of TA’s working every lecture course (because they have recitation sections). Typically 1 TA for every 20 students in those courses. With that number, it is very easy to have all tests hand graded in a week (about 10 hours of work).</p>
<p>Physics and Chem are different. They don’t have recitation sections and don’t have a team of TA’s grading (other than lab assignments). </p>
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<p>Then there should be some major classes in that schedule.</p>