My teacher is an alien

2.

Duncan Dougall discovers that his teacher, Miss Karpou, is an alien, but not before she chooses him to participate in an experiment in which he dons a helmet that fries his brains, but makes him smarter.

4.

Peter Thompson, a typical seventh-grader, finds himself touring the planet with his friends Susan Simmons and Duncan Dougal--and three aliens in disguise! Their mission? To file the final report that will determine Earth's future in the universe. As the clock ticks away the hours before their meeting in space, the tour becomes weirder and weirder. The three friends come face-to-face with a plague of poots and "Big Julie"--the weirdest alien yet! Meanwhile...