Thanks, joecichlid, for doing this!
Chapter #2 0:05:10-0:06:35 Debate scene, next to male lead
Chapter #3 0:08:40-0:09:23 Playing tambourine and in front of female lead a few seconds later
Chapter #15 0:47:57 Girl on left walking towards steps of school
Chapter #18 1:07:50-1:08:00 Girl on right side of bench, not sure though
Chapter #18 1:08:46-1:08:49 Blond walking by, again not sure
Chapter #21 1:28:40 Behind Lana when she says, "Mia, you're such a freak" on the far right
Chapter #21 1:28:51 On the right side of Lilly chanting, "Lana got coned"