If you are really in dire straights, you could call the humane society or the ASPCA - or a rescue group to see if they will come pick up one of your snakes.
You could talk with your teachers - maybe your science teacher to see if they could help you re-home it.
You could put ads up around your school. Talk with your principal. Call the people at the pet store and see if anyone drives past your school- maybe they could drop off mice at the office (stranger things have been delivered!)
Maybe you have a friend or a teacher who lives near the pet shop who could stop by and pick up some food and bring it into school the next day.
Possibly you have a preacher or priest to talk with? Maybe that person could talk with your parents if yall go to church.
Just some ideas.
