There are two types of stimulants: amphetamine (Adderall, Vyvanse, Evekeo…) and methylphenidate (Ritalin, Concerta, Quillivant…). Almost everyone does well on one type or the other, but not both. Your son has tried both types. The best next course with medication is to determine which of the meds you tried worked best, determine what type of stimulant it is, then try a different stimulant in that category.
Traditional classroom environments are definitely not suited to kids with differences. Make sure you’ve requested accommodations and/or services at school.
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism