As an instructor (now part time) landings have always been a "pet" teach, What does chew up rwy is the student changing their aiming point the closer thay get to the rwy.On finals pick a point near the threshold and stick to it!!!!! right down to 10ft gradually retarding the power, then hold off and fly the aeroplane to the other end of the rwy without the power on the aircraft will settle. Appch speed is also important so refer to the POH for the aircraft you are flying (C152 55kts)
Good luck
Skysurfer