As administrators, you have the ability to make the exam only appear after the user finishes watching the course. Here's how.
Go to Administration from the main menu and click Campus Settings from the drop-down options. Click on the Customize tab and go to the Misc. Settings section. You'll see an option that reads, Must complete video before exam. Check that box and hit Update Account to save your changes.
After that, every course on your Thinkzoom account will block a user's ability to take an exam until after the course has concluded.
If you need further assistance on this topic, feel free to contact our support team anytime between the hours of 8am-5pm, Monday thru Friday, or if you prefer emails to phones, submit a support ticket.