On October 17, 1997, about 0946 eastern daylight time, a Robinson R22 Beta, N333PH, registered to Pompano Helicopters, Inc., rolled over during landing at Pompano Beach Airpark, Pompano Beach, Florida, while on a Title 14 CFR Part 91 instructional flight. Visual meteorological conditions prevailed at the time and no flight plan was filed. The helicopter received substantial damage and the commercial-rated flight instructor and dual student were not injured. The flight originated from Pompano Beach, the same day, about 0930. The flight instructor stated they were performing an autorotation landing. The student was flying the helicopter. The student flared for landing and as the helicopter leveled it was still moving forward slowly. The student initiated a power recovery at which time the low rotor rpm horn sounded and the helicopter began to settle. The back of the skids hit the turf and they bounced forward. The left skid hit the turf and the helicopter began to lift up. The student continued to raise up on the collective as the instructor was trying to push down on the collective. The instructor was not able to establish a proper recovery and the helicopter turned over to the left as a result of dynamic roll over.