I think OP says he works at a high school. Should be fine as long as you were NOT paid. If it was paid, it would go under work experience if i remember correctly.
OP is talking about it being at a high school, rather than it being while they were in high school. But I would imagine if it is something starting in high school that continued into college or beyond, it can count. But if it ended at the time of high school graduation or before, then it's old news and should not be included.
OP is talking about it being at a high school, rather than it being while they were in high school. But I would imagine if it is something starting in high school that continued into college or beyond, it can count. But if it ended at the time of high school graduation or before, then it's old news and should not be included.