I never had any lesson plans. I've certainly never used one with a student. On my original checkride, the Inspector asked about one, and I drew one up on a chalk board and presented part of the lesson to him, but for other instructor intial and reinstatement rides...no lesson plans. Didn't own any, didn't take any, didn't use any, nobody cared. The inspectors and examiners did care if I could teach, but not about what gimmicks might be in the bag.