Hi, I too have been there when I was in university and working in a factory..... skipping breakfast and lunch sometimes not eating dinner till 11pm at night... your body needs all the nutrients it can get... if your skipping meals your body will look for it elsewhere holding on to fat etc...
May I make a suggestion since ive been there and done that?
In the morning while your getting ready eat a piece of toast with peanut butter and a banana while your getting ready.
While your at school, eat granola bars or protein bars while your on the run to class... while your in class snack on grapes or strawberries, or carrot sticks and celery or nuts and snack mix... (bring these in your purse *pack the night before so you dont forget)
When you have an hour break in between classes have yourself a decent lunch while reading or studying.... grab a nice sandwich or sub with some fruit or veggies. your body will need this energy boost to get through the rest of the day.
be sure to be hydrating throughout the day bring bottled water with you that way you can fill it up again when you catch a fountain... if your not a big water fan grab some crystal lite packets and bring those too... they have some great green tea flavours with antioxidents for you.
keep snacking if your hungry though out the day in class until you get home. make yourself a sensible dinner a good meat and potatoes kind of dinner.... get lots of veggies along with your meat.
there is a website where you can enter everything you have eaten through out the day and drank as well as log your exercise activity and it will tell you what vitamins and minerals you are low in for that day based on what you ate... it is a big help to me you should try it.....
www.caloriecounter.com no need to sign up it will log itself in if you have facebook accounts or anything else...
Good luck and no starving yourself intentionally or intentionally.... ultimately it is Anorexia... and could lead to some major health problems that can be hard to get out of and recover from... the weight loss may seem great but trust me it wont be in the long run.