The airplane impacted a ditch following an uncontrolled exit from the runway surface. The student pilot and certified flight instructor were returning from a local area training flight. During the landing to runway 33 (3,401 feet by 100 feet, asphalt), the airplane lifted off after touchdown. The instructor reported that power was increased but the airplane yawed into the left crosswind. The airplane then exited the runway into the grass adjacent to the runway. The instructor stated the main gear dragged in the grass and the nose gear dug into the ground. The airplane then pivoted to the right and the left wingtip impacted and dragged through the grass. The reported wind conditions about the time of the accident were from 280 magnetic degrees at 13 knots, gusting to 21 knots. Inspection of the airplane did not reveal any flight control or mechanical malfunction that would have prevented normal operation.