Panel 2: Okay, I'm really picking a nit here, but that's a good answer, not good work.
Panel 3: Why does she look so manic? And snow machines? Like, snowplows? When I think "snow machine", I think of a machine that makes snow, but then, I'm in L.A. Anyway, if I didn't connect Polaris with the North Star, I would probably think of a submarine.
Panel 4: Sigh. I'm not sure what she's learning, but I'm getting rawther sick of these everlasting "Liz's students are smarter than she is" moments. Is she going to throw up? That's what it looks like.
Also, seeing the phrase "The earth revolves around the sun" on the blackboard, I can't help thinking of the Simpsons episode I was watching the other night. Springfield was ranked dead last in education, as evidenced by Principal Skinner repeating that phrase, while he was being burned as a heretic.
At any rate, I can easily see this taking up two weeks, since practically everything Liz says is the straight line for an irreverent Native quip. Is this a classroom or Theater Sports?