The Attack of the Two Inch Teacher
I Was A Sixth Grade Alien, Book 2
Written by Bruce Coville
from the back cover
All Pleskit Meenom wants to do is fit in on his new planet. But even a trip to a mall for some 'earth-style' clothing isn't enough to stop Jordan Lynchs's teasing. Finally Pleskit and his new friend Tim decide to teach jordan a lesson. So they borrow a shrinking ray from the desk of Pleskit's Fatherly one. Unfortunately, things didn't turn out quite the way the boys planned, and before they know it, Tim and their teacher,Ms. Wientraub, are small enough to hide in a desk drawer. If word gets out it can ruin the alien mission. But how can you hide the fact that you've shrunk the teacher?