I remember being thrilled as a youngster myself seeing a young Superman I think being frustrated by the necessity of hiding his powers (like while playing football). I am sure this has since the 1950s version been dealt with -- maybe in one of the Chris R. movies but what I think I remember is that the 1950s version actually had an episode with a young Clark Kent -- am I right?
The very first episode of the George Reeves series, "Superman on Earth" has a 12yo Clark Kent discussing with his mother was is he so different than other boys and girls. He mentions playing a baseball game in school and they lost the ball. Clark finds it behind a rock by looking through the rock. https://www.dailymotion.com/video/x4npm2p
I suspect you may be thinking of The Adventures of Superboy from 1961, starring Johnny Rockwell.
The Adventures of Superboy is a proposed TV series that was put into production in 1961. It was meant to capitalize on the success of Adventures of Superman, which went out of production in 1958. Only a pilot episode ("Rajah's Ransom") was produced, although 12 additional scripts had been prepared, had the series been picked up.
It featured the first non-comic book portrayals ever of Superboy and Lana Lang and stands as a forerunner of later series Superboy, which lasted four seasons and Smallville, which lasted ten seasons.
Searching for teenage superman suggested who played teenage superman in 1978, which led to this entry in the "Every Actor Who's Ever Played Superman list.