Stand and Deliver
After you've passed the CTT+ computer-based exam, you then have to submit a 20-minute video of yourself teaching a class with students. CompTIA warns that this is to be a non-edited video of an instructor doing their best. You are not to plant stooges within the audience to create situations or ask pre-planned questions. You are, however, to involve and interact with the students within the class.
Treat the video as if it were a regular class, although I recommend a planned, 20-minute presentation on a particular subject. Practice the demonstration a few times and then shoot it. You may want to deliver three or four different twenty-minute sessions and then pick your favorite. Of course, the submitted video should include only one lecture that is not more than twenty minutes long. For safety's sake, keep a backup of your video.
Once you've earned your CTT+, you'll have proof that you are a qualified technical trainer. Of course, the real proof is that your students leave your classroom with new knowledge and a desire to learn more.