I would eat a big breakfast that's high protein and fat before you leave for school. It'll keep you full and satisfied without causing an insulin crash after a few hours. Or you might find eating a big meal in the evening leaves you feeling full the next morning, and you eat later. The number of meals is not as important as companies that sell meal bars and shakes want you to think (because it's oooh so easy to just eat a bar or drink a shake they sell for one of those 6 meal AMIRIGHT?)
You can take a ziplock bag full of "trail mix" with you, pack sandwiches that won't spoil at room temperature, eat a big meal before class and another once you return, plus a big dinner (aka 3 squares a day), or look into something like LeanGains/IF. 5-7 meals a day is one of the biggest lies ever perpetrated on the lifting community. If it works for YOU to control your hunger that way great or to fit in all your calories that's great; it certainly isn't needed to gain muscle mass,loss body fat, or "stoke the metabolic furnace" as so many parrots claim. I'll get off my soap box now.
