Depends entirely on the child, your relationship with him or your relation to him.
His interests, his fears, his desires, his capacity to achieve what you think he should and what he truly is capable of achieving.
His goals not yours, his life not yours. if a parent you guide and inspire through example, if a family member who is concerned same as above, if a worried friend same as above.
How can you be sure what he has achieved is not the best he can do?
Most boys are bored with school and they are not ready to learn until they are older at least that is what research has shown but when they are ready they achieve in what they are most interested in.
Don't we all.