Can Good Grades Lower Car Insurance? 
Good grades often equates to good drivers -LRB- but not all of the time -RRB- . For that reason , most car insurance companies discount your rate if youthful drivers are earning a `` B '' average for the most recent grading period . The amount of the discount is typically 10 % -20 % and over the lifetime of the policy , it could save you thousands of dollars . 