Did the track have a curb? Watching my kid's HS meets, there is no curb on the track and so many of the runners are stepping inside of lane 1 routinely, and there is no official watching.
Although the above is true, of course I'm just kidding. LIke the other guy said, you have the 8th grade record. And you can say, "I set a record that stood for 28 years." Isn't that longer than Beamon's LJ record survived?
My daughter has two MS mid/long distance records and we are thrilled they have lasted just a few years- so 28 years is impressive.
And maybe this kid will become elite- and then you can say that it took somebody as great as this to break your record.