1. After signing into your teacher account, click the "Settings" link in the left sidebar.
  2. Select the "Modules" tab at the top of the menu.
  3. Click the Test Prep and Review module from the side panel.
  4. You can choose to adjust the grade level to practice, toggle sound settings, and set the module to continue on after a grade level has been completed. 

To change settings for individual students, simply follow the instructions here.