Here are a couple of scripted phrases you can use at the start and end of each lesson, to give your course a level of continuity throughout:
Gender Neutral Phrasing
Our courses should be gender neutral wherever possible. Attempt to restructure any gender-specific sentences with this goal in mind and avoid opening phrases such as "Hey guys."
No: “A good photographer keeps his gear neatly organized.”
Yes: “Good photographers keep their gear neatly organized.”