There is a difference between being actually hungry, and beginning to feel the need to eat. Other commenters are comparing hungry kids not being able to focus o

There is a difference between being actually hungry, and beginning to feel the need to eat. Other commenters are comparing hungry kids not being able to focus on learning, which is absolutely true. Its not just the hunger for them, its about food insecurity. They don't know if they'll get food tomorrow, so the idea of staying fed is primordial there. That said, for me, a state of feeling light-headed with the need to eat in the background works best. Satiation is a never ending pit, you'll need to fill in 15 minutes after you last felt satiated. But if you can ignore that little sugar-triggered signal, focus becomes both easier and intense.