Lectures average about 30 to 35 minutes in the live online classroom and about 5 to 10 minutes less on the recordings/interactive lessons due to not having the student side of the discussion. Remember that the student will also need time to take the lecture quiz, so plan to have an additional 10 to 15 minutes beyond the lecture for the quiz completion. These are merely average times. Some lessons will be longer and some shorter than the average.