Your examiner will probably assign a couple of lesson plans in advance he will want you to teach so I would concentrate on those. I made plans for every single manuever in the PTS when I did my CFII initial and then never even opened the binder during the oral. He had me draw out how to fly a DME arc and that was it. And these other guys are right....you will never use them again after your ride. Just teach to the PTS standards and you'll be good.