The Adventures of Superman
... when he was a boy

The Legion of Super-Heroes

An organization of teen-aged crime-fighters and adventurers - representing Earth and more than a score of far-flung planets and consisting, all in all, of several dozen active members, honorary members, and reservists - each of whom possesses some unique super-power distinct from those possessed by every other member of the group. The Legion makes its headquarters in the city of Metropolis in the thirtieth century A.D., where it is primarily active.

This is the Real Superboy. He may be gone from the comic pages, but never from the encyclopedia of memory.

Among the Legion's many members are Ultra Boy, Phantom Girl, Bouncing Boy, Brainiac 5, Timberwolf, Chameleon Boy, Cosmic Boy, Element Lad, the Invisible Kid, Mon-El, Shadow Lass, Karate Kid,Princess Projectra, Lightning Lad, Saturn Girl, Sun Boy, and Triplicate Girl.

When Superman was a Superboy, he journeyed into the future and joined the Legion.

Supergirl is also a member of the Legion. Supergirl has since died and been reborn.

Lana Lang was Insect Girl.

The Legionnaires are fully aware that Clark Kent is secretly Superman. I'm sure it was very difficult to figure it out.