You know how hard it is to get things done when you're hungry? Your head feels foggy, it's impossible to retain anything, and you end up having to redo simple tasks.
Now imagine you're a growing kid who's trying to learn new things in school. Suddenly there's a lot more at stake than a few hours of extra work.
Sadly, that's the reality for a huge percentage of kids around the world. 66 million primary-school-aged children across the developing world go to school hungry every day. Not only does this undernutrition cause a whole host of health problems, it greatly affects their ability to keep up with their studies.