Panel 1: Edwards explains her being a sitcom character by saying that she wanted to teach a higher grade but wasn't sure she'd be transferred to that particular school.
Panel 2: She then says that there she is and they'll have more deepities and trivia yet.
Panel 3: Liz tells the other two that Miss Edwards made science trivia interesting. Dawn agrees.
Panel 4: Hers was the hardest class to sleep through.
Summary: This is another reason teens are monsters: boomers never want to admit that puberty jenks up a growing child's circadian rhythm because that means that they lose at generation warfare.