Academic acceleration in gifted youth: a 35-year longitudinal study
There is no argument against academic acceleration beyond that it increases inequality of achievement. If the school system was about education more than childcare acceleration would be the norm for bright children and we’d have 14 year olds starting their Bachelor’s level studies in every school and 20 year olds who already had doctorates in every city of any size. Instead we waste their time, to their detriment and ours. Theirs, because if you’re going to be in school you should be challenged, and ours because they’d be able to start their professional lives earlier or with substantially more education, and hopefully skills.