Tell the user to follow these steps:

1. Review the practice questions individually, as shown below. From the Practice Questions dashboard, select an individual subject. Scroll down on this page until you see the "Review All" button. You can tap this button to review all questions from the beginning or tap a specific question to review that one. 

2. At the bottom of each page, above the “Done Reviewing” button, you will be prompted to mark your confidence level. Your confidence level will save automatically.

Please note that this process is similar for Exam questions, but not all Exams can be reviewed.