When I'm bored at school, I do several things:
Play "Block Dude" on my TI-83+(gotten to level 8 if I remember...)
Re-color my TI-32(with Sharpies, I've gotten many complements)
Fold up the edge of the loose-leaf paper that comes in a Mead Neatbook(it's fun)
Show off my Mazda pens, Mazda keychains, Mazda notebook, and other Mazda stuff to classmates that are also bored.(I just got this cool mini-Mazda booklet, it explains who they are, thier history, thier cars, thier programs, just about everything about them in a 1"X1.5" foldout booklet, very spiffy)
Practice drawing Mazda emblems on my stuff, or creating Mazda images on the TI-83+(very fun, my bro once made a drawing of the intire engine bay of his '87 626, and I've made front, back, and side views of the 3, started making an interior view but it looked terrible, so I quit)
Look out the doors and windows of the classroom and wave at the peeps.
Look around the room at the shotty job Parkway did at putting up the walls after they found out that maybe an "open" style school doesn't work(back in the '70s, Parkway did this in several schools, all failed horificly, so they put up piss-poor walls that deflect when leaned against and offer very little in noise dampening and have big gaps and stuff between the segments)
Daydreaming about possible situations that could close the school(one was a delivery truck backing into a support pilar and part of the school collapsing)
Daydreaming about what I could be doing becides class and how much more I could learn while not in class.
and a lot of other stuff...