I always teach a "300ft check" on final appraoch. That being 1. Carb Heat to cold. 2. Landing light checked on. 3. "Clearance" to land. 4. Runway is clear.
That way carb heat is cold in anticipation of the "go-around" and if the student later moves onto a more complex aircraft, they are used to doing a check at 300 ft which can be substituted for "Reds, Blues, Greens, Whites."