Part Time Contract Question:

If you're a student, you'll need to share your class schedule, and any labs, to avoid confusion for your supervisor: "I have classes Tuesday and Thursday until 4 pm, and a lab that meets every other Wednesday from 5 pm to 7 pm, but I'm flexible about working any other hours you have available.
I'm available during school hours while my children are at school, 9 am - 3 pm, Monday through Friday, and I can work some weekends, also.