It's an antiquated idea, but explicit classroom instruction about agreeing to disagree might go a long way for some kids, if only to counter a media environment that only tells you exactly what you already want to hear.
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More controversially, I've found that some young people would really benefit from disengaging with the entire concept of "mental health." Their obsessive focus upon medical labels and the dysfunctional communities it brings them in contact with only serve to warp acute distress into chronic misery.