i know that if u have good grades or if u take driver's ed, ur insurance is less, but does anyone know if they choose both, or only one?
That depends upon the insurance company. I suggest you check this site, then call agents for several different companies to get their rates based upon your grades and driver's ed.
http://www.carjunky.com/carinsurance/Car_Insurance_Premium_Factors_Your_Record_%20Age_Driver_Education.shtml