<p>I heard about CLAS but I haven't had the opportunity or free time to check it out. I'm in PSTAT 5A and would like to go to CLAS for some help but I'm not exactly sure how it works. Is it something you sign up for on their website or do you simply show up to the Student Resources Building and attend the days they have available? Also, is it a good resource to supplement your lectures and office hours?</p>