<p>well, i know for a fact that berkeley upper div physics classes dwindle after 1st couple of weeks. unless prof’s have some incredible insights on the subject, there isn’t a point to go to classes since everything can be read. i personally skipped a lot of classes because i dont like to get up early, and most early classes are too slow for me. i took classes as more of a motivation to study the areas that i normally don’t want to touch. i usually read a few review paper before exams and try to absorb everything i read during exams. it might hurt my grades a little since prof might stress on details that i ignore, but i feel that i learn a lot more this way than pure memorization of lecture notes. plus i dont feel that this way really hurts my chance of getting good rec’s because i tend to grill prof when im at lecture (since that’s probably something i am into and read a lot about) and they know that i am a good slacker. (and yeah i didn’t skip classes to do nothing, i actually spent these time at lab). so i think it doesnt really matter how many classes you skip. just be on top of your thing if you do skip classes.</p>