The pilot was a student with limited experience. He was attempting a flapless approach and landing. The pilot reported that the airspeed was higher than required as the aircraft crossed the threshold and when he attempted to land the aircraft it touched down nosewheel first. Following a number of bounces the pilot opened the throttle and attempted to go around for another circuit. As he did so the stall warning sounded. The pilot closed the throttle and attempted a final landing. A combination of low airspeed and inexperience caused the pilot to loose directional control and the aircraft turned approximately 30 degrees off runway heading. The aircraft touched down on the grass flight strip, to the left of the runway, and ran across the grass for approximately 80 metres before turning through 180 degrees and stopping.