Do I have to score a certain percentage on the practice exams in order to complete the lesson?

No, your lesson will show as completed once you have read over the textbook tutorial and taken the practice exam at least once. For first-time test success, we do recommend that you retake our practice exams until you score at least 90% or above. On your state test, they can test you on anything and everything that is contained in the textbook. We have no way of knowing the exact wording of the State Exam questions, so it is extremely important that you memorize and understand the textbook material.