A certified flight instructor and his student flew a short cross country flight. At the destination airport, the pilots practiced five landings, and then the flight instructor exited the aircraft so the student could practice touch and go's. On the third touch and go, the student pilot was too far left of the runway and initiated a go around, during which the airplane "stalled." During the subsequent uncontrolled descent, the airplane clipped trees and impacted a ravine upside down, breaking off the right wing. The pilots stated that there was a 5 knot wind from the right but thought it was not a factor. They also stated there were no mechanical deficiencies with the airplane prior to the accident. Both pilots were contacted numerous times and neither submitted a National Transportation Safety Board Form 6120.1 as required.