Despite being a Time Lord, like your dad, the Doctor, and immortal like your Papa, Jack, the Doctor, they are making you go to school... Human school...
They don't want to throw you right into the deep end with learning, instead deciding to send the Time Lord equivalent of a four year old human, you, to primary school.
The Doctor parks the TARDIS a short walk away from school, not just to hide it from other parents and nosy children, but so that you get to feel like the other kids, walking to school.
Walking to school, you have Jack on your left, holding your hand, and the Doctor on your right, also holding your hand. Jack carries you little backpack, slung over his shoulder, the Doctor carrying your lunchbox.
Finally arriving at the school, you approach the playground with your fathers, getting brief glances of other kids and their parents. It's then they both stop, kneeling down infront of you. Jack hands you your backpack and the Doctor hands you your lunch box... The Doctor, being the proud parent he is, makes sure to get loads of photos of you in your uniform, to show off to his friends...... And the bell rings, the school day starting.