"A.J. and the gang at Ella Mentry School are in for a super surprise when a new teacher, Mr. Cooper, take over their third grade class." --

New third grade teacher Mr. Granite has so many strange ideas about how to make Ella Mentary School environmentally friendly that the students are sure he must be an alien.

Plans go awry when Amp, the four-inch-tall lead scout from the planet Erde, uses parts from fourth-grader Zack's walkie-talkie to build a quantum radio to alert his commanders to call off the pending invasion of Earth. Includes directions for building a radio.

Injured in a bicycle accident, Zack discovers that his alien houseguest has swiped his brakes, placing Zack's baseball season in jeopardy while subjecting him to an annoying little brother.

Zack and his alien buddy Amp must save the planet from an alien invasion.

Twelve-year-old Jonny Jakes is an undercover reporter for a banned school newspaper, The Woodford Word, and right now he has the story of a lifetime--the new principal is an alien (he does not even try and hide it), Jonny is sure he is planning something nefarious, and it is up to the Word's star (really the only) reporter to find out what it is.

When John Riley gets on the wrong bus he finds himself at Hyperspace High, an elite academy on an enormous spaceship, where his classmates are aliens, and the penalty for failing is harsh.

"Zack McGee has gotten in tons of trouble thanks to Amp, the four-inch-tall alien that crash-landed into his bedroom, but when Amp's commander, Ohm, comes to collect the stranded alien, it's Amp's turn in the hot seat!"--

It is time for the annual Robot Warriors contest, when each student has to build a robot to compete in various trials--but when John Riley finds himself in direct competition with his best friend Kaal he is worried that their friendship will not survive the test.