I'm trying to get a driver's permit.?
See my answer for When you first get your driver's permit, can a parent visit the DMV for you or do you have to be there in person? How about this? Ask your parents for a special day, a day you will feel prepared, to go to the DMV with them? They will have to be there because you're a minor, at least in most states. So, ask them to make an exception this one day and go with you to get your driver's license. If that's not an option, your school must have some half days or school holidays coming up. Plan around those times. Congratulations on getting the priviledge of driving!