On December 16, 2005, about 1700 eastern standard time, a Cessna 172P, N51434, registered to and operated by Delta Connection Academy, Inc., nosed over during landing at Opa-Locka West Airport, Opa-Locka, Florida. Visual meteorological conditions prevailed at the time and no flight plan was filed for the 14 CFR Part 91 local, instructional flight from North Perry Airport, Pembroke Pines, Florida. The airplane was substantially damaged and the certified flight instructor (CFI) and student pilot were not injured. The flight originated about 1620, from North Perry Airport. The CFI stated that after takeoff the student performed airwork then the flight proceeded to the Opa-Locka West Airport where the student performed 1 touch-and-go landing. The flight departed following the landing, remained in the traffic pattern and the CFI took the controls to demonstrate a soft field landing. While on final approach with full flaps extended the CFI later reported the flight was fast and floated down the runway. The airplane landed approximately within the 2nd third of the runway and he applied the brakes which locked up. Unable to stop the airplane it traveled off the end of the runway onto grass and nosed over. The CFI further stated there was no failure or malfunction of the airplane or its systems. Postaccident examination of the accident site by the operator revealed water covered grass and soft terrain beyond the departure end of the runway.