Yeah I agree Irescue452, I'd say about 3 meals a day for him at that age. On a few weeks cut it down to 2 meals.
Can you feed him right when you wake up, then as soon as you get home from school then again late evening. And maybe even feed him a little bit of a smaller meal when you get home from school just to hold him over a little.

Or can you do some extra training sessions with him, make up for his meal in treats (you can even use the kibble from his food as treats).