Two teams of kids, divided up into reds and yellows, representing the school they were from.
The kids would participate in silly games, occasionally accompanied by a current pop hit. Two or three pop acts would appear in the studio each week, many of them big names of the time.
It's a show that's been forgotten about by pop show historians, probably choosing to ignore it due to their aversion to the host, which is unfair. There's plenty to investigate here, but when seventies/eighties compilations are broadcast this one is usually absent.