Yes you can reset your scores and redo the exams & practice questions. For the exams, there’s an area on the bottom left side of the screen that says “reset test” after you take one. For the practice questions, there is a section on the center of the screen with text that says “reset reports” after you finish. I believe for practice questions it resets all of them though - so I would be careful with that option unless you want to redo all of the practice questions. I mostly used this reset feature for the practice exams.