Where do slightly brain damaged teens go to school or do they?

If a previously honor roll teenager has taken a potentially deadly combo of drugs where do they go from there if they live through it but become confused with erratic conversation? That is ,they know who the president is , where they live and who their friends are but they can’t keep to the subject and they make irrelevant remarks ; their speech is clear and they’re physically healthy but their mind drifts off into unimportant facts from, say, the past? They can’t continue in public school, correct?