<p>Is it like, one class and 1 lab/discussion, or do I choose multiple ones?</p>
<p>I recall someone saying units are based on how many hours per week. So do I keep choosing labs/discussions till I get those amount of hours, or is it just 1 choice of class and 1 choice of lab discussion?</p>
<p>If it helps, I can list my classes as well.</p>
<p>A class is generally 1 lecture + 1 discussion/lab. The number of units vaguely represent the amount of work that students have to put into the class. For example, classes with labs often have 3 hours in lecture and 4 hours in lab while other 4 unit classes may only have 3 hours in lecture with no discussion at all. It varies from class to class.</p>