The us has over 150 elementary schools on military bases. If you use a more colloquial definition of military base, many many national guard armories are on the same block as elementary schools or even right next to them.

Can you cite anything that says all iranian military bases are next to elementary schools? If they are on ALL bases, that makes hitting an elementary school on base less forgivable, not more, because if its a fact of every iranian military base, it's a lot harder to claim good intelligence and also that they didn't check that the part of base being bombed was the school.

Also, how is that relevant?

There are plenty of military bases next to elementary schools in the US.

Where do you think the kids of soldiers go to school?

We do. Grocery stores (commissaries) and residential units as well.