<p>it precedes its first respective lecture section?</p>
<p>Yes.</p>
<p>10 char.</p>
<p>Well discussions, not usually. I'm not sure about labs. Write your GSIs.</p>
<p>check the websites of the class or on the schedule website (they sometimes have something about that in the "note" section).</p>
<p>I think it depends. Some are held, some are not.</p>