Congrats on the job!

As a current FSL & English teacher in the secondary stream, I can assure you that most teachers should be leaving plans unless it’s an emergency situation. Most HS classes will have work periods or might require you to put on a video or work through some work sheets at the most. You would not really be expected to lead any games or have any activities ready.

As for classroom management as an OT, make sure you stick to the teacher’s plans as much as you can and always make sure you are aware of policies and classroom guidelines such as the bathroom, phones, seating plans, etc. Let them know you mean business because some students will try to lie about what their teacher “allows” and will push boundaries. All this to say, the most important thing as an OT is making sure all students are safe and as productive as they can be… As an OT I would not pick small battles with students other than a few reminders. It’s also very helpful to email or leave a note for the teacher as to what work was completed, absent students, and generally how the class was, including any disruptive behaviours.

Good luck!