1. Most lessons give basic terms and examples but follows it up with a quiz that goes beyond terms that have been explained. This forces you to suspend your quiz and first research terms and phrases that have not been covered in the TEFL course. 2. Interface that is supposed to track your progress keeps resetting to zero, does not remember to "continue from last point" and does not allow video playback from any country that has any form of internet censorship. 3. Lastly (but this might not pertain to all), the websites frequently responds with a "time out" error message meaning it takes twice as long to get anything done.