Must / Must not – Presentation
Auxiliary Verb “must, must not” – You must present this to you class.
This is a presentation on what you must do and must not do at school.
I start off with “Is this OK at school?” showing the pencil.
“Right, you must use a pencil at school.”
Then go from there asking questions and using the must / must not target language. The last image is that of a knife with lot’s of gifs saying no. You may want to change it to something else. Depends on your relationships with your school and students.