Slow flight is a lesson I believe is not paid by far enough attention too by many Instructors. It is a lesson on its own and not to be tagged onto the back of anything else.
It should begin by teaching the student how to fly straight and level (I use the example of the 152) at 65 knots. Then from S+L at 65 knots the student should be taught how to put the aircraft into climb maintaining the speed and then level off again. Same for a descent.
Then from 65 S+L put the aircraft into a turn demonstrating the need for additional power to maintain the airspeed.
Then teach S+L at 55knots with 2 stages of flap. Then climbing/descending/turning in this configuration.
Finally the Instructor should demonstrate a clean stall recovery without power to demonstrate to the student that there is nothing too scary about stalling which the student will know by then is the next lesson.
This lesson adds polish to handling skills but more importantly allows the student to grasp that pitch controls speed power controls altitude which is so important when you move onto flying in the circuit.
If you are not teaching your students this lesson you are not doing your job properly!