<p>The rigor of the class is not so much as the difficulty of the class materials as the pace of those materials covered.</p>
<p>I took 32A, the mutivariable class, and the professor ended up covering a chapter each week. So if you miss just a single day of class, you are left with a lot of ground to cover by your next class.</p>
<p>Why dont you check out the syllabus for each class? Some of the class syllabus are posted on line for public viewing.</p>