I am looking for this movie that I saw as a kid on the early 90s (though I am fairly sure it was a film from the 80s). All I remember was that this group of young kids somehow got stuck on a space shuttle that was shot into orbit and then they must perform repairs and follow the advice of a female astronaut in order to safely make reentry.
Seems virtually certain this is SpaceCamp (1986).
I haven't actually seen the movie, but the basic plot is that a bunch of kids at the NASA sponsored SpaceCamp are given the chance to tour a Space Shuttle on the actual launch pad -- I know of no sensible reason this would have been allowed with the External Tank fueled (and during the relatively short time it could be kept so before boiloff of the propellants was a major issue) -- but somehow, while they were aboard, the Shuttle got launched and automatic systems put it into an orbit (ignore the need for OMS maneuvers to ensure the ET is burned up in atmosphere and the orbiter kept in orbit).
So now, we have half a dozen teenagers and their mid-20s counselor in orbit, none of them qualified pilots, never mind trained astronauts.
This is why I haven't watched the movie, but the overall plot is that they do, in fact, manage to reenter and land the Orbiter safely.