Keep it simple. Don’t try to do anything that you haven’t done before.
That doesn’t mean that you should teach to exactly the same format and stick to it. You can, however, ‘rehearse’ elements of a lesson.
For example, you may want to include ’jigsawing1’. Simple techniques like this are a great tool for students sharing information but, if the class are not familiar with the process, you could end up troubleshooting group dynamics which will detract from the fantastic physics content that you have taught.
If you have more than a few weeks’ notice, ensure that your preceding sessions are well planned and referred to in your lesson. Additionally, include reference to subsequent lessons, as this will establish your viewpoint with regard to medium term planning and pupil progress.
Many schools have a preferred lesson plan layout which you should use if at all possible (your head of department should have a copy). Ensure that you make copies of your plan for all the adults within your class ahead of time.
You may be required to give a copy to the observer before the scheduled lesson; if not, make sure that there is a copy available to show them.
1 Hänze, M., & Berger, R. (2007). Cooperative learning, motivational effects, and student characteristics