Johnny B. Goode, Or Else! by Jeffrey Alan Schechter

In his first novel for young readers, Jeffrey Alan Schechter tells the wild story of Johnny B. Goode, the most average kid on the planet. In fact, he's so average that he's been selected by the Federation of Celestial Orbiters (F.O.C.O.) to be the perfect subject to test earth's worthiness for inclusion in their galactic organization. If Johnny passes every test earth will be welcomed as a member of the prestigious Federation. But if he fails even one test...well...earth becomes a Class Five slave planet.