the problem is, when chldrens minds aren't stimulated enough, then they start to become a problem child
i was like that all the way through primary school, until in secondary, there was finally stuff that was challenging enough for me
it really depends whether that should be allowed
if this person gets moved up, they'll find it really hard to fit in to the social groups, and will probably be the subject of a lot of bullying
if this person is kept at the grade they are in, then its not going to benefit anyone
also especially with the less mature years, people will complain and give no ends of grief to people
its a difficult question, but if the student wants to, and is able to, they should be allowed