The student had returned from the training area, after a solo consolidation exercise, and entered the circuit for runway 24R. He made a normal approach but allowed all three wheels to touchdown together causing the aircraft to bounce back into the air. The pilot applied some power, in an attempt to rectify the situation, and landed the aircraft a second time. The landing was heavy, resulting in structural damage to the nosewheel and causing the propeller to strike the runway. The aircraft finally came to rest with the nosewheel completely separated from the nose undercarriage strut. It is probable the student's inexperience was the major factor in his misjudgment of the initial approach and in the failure of his recovery action to prevent the heavy landing.