Peanut butter and banana sandwiches are perfect for snacking in between classes. Say you have an hour and a half break, eat one like-15 minutes before your next class and you won't be feeling drained. I use wheat/12-grain bread for mine and it's best when the banana's are all freckled up.
Slather up the PB & J on both slices and use the whole banana. Easy to make, word to Homer:
1-Smucker's Goober Peanut Butter & Jelly = $2.00
2-Bag of Wheat Bread = $4.00
3-Banana's = approx. $4.00