What does your school do with their clock? Is it always running during the game or does it stop on a goal? I've seen it both ways.
We run it...any stoppage time is part of "the official time is kept on the field" when we're under the 2m mark.
We only stop it at two minutes since the ref has the official time.
On a side note, we had a ref stop the game because the person running the score board (a 10 year old younger brother of a player) accidentally put the score on the wrong side.