If the student is receptive i would introduce, although briefly, adverse aileron yaw and its reason on Effects of Controls.
I could never understand why we tell students that secondary effect of ailerons is yaw towards the lower wing. surely the by product of aileron application is adverse aileron yaw (yaw in the opposite direction of bank).
Secondary effect is usually explained as yaw toward lower wing after the aircraft has banked. The aircraft could become banked due to turbulence/wing drop followed by yaw/spin without any aileron application.
Yaw (toward lower wing) is the effect of being banked.
Also can anyone explain why in Piper Tomahawks when you apply left/right rudder to demonstrate secondary effect of rudder, there is very little yaw but the nose pitches down!
Could it be disturbed air from over the cockpit upsetting that T tail.
Crosswind landings?