Beginning (gram on left) – On your knees and hands on the ground, perform a push-up. Try and keep your elbows right by your sides to focus on triceps.
Intermediate (mom in middle) – Do one push-up on knees followed by one on toes, or do as many as you can on your toes and then the rest on your knees.
Advanced (me on right) – Place your feet up on a bench or stool and do a push-up. Keep your elbows right by your sides to focus on triceps while pushing up and down.