The student pilot stated that during the fifth landing of the solo instructional flight, the airplane landed "hard" left of the runway centerline, bounced, touched down a second time, and departed the left side of the runway. During the roll-out in the grass, the nose wheel dug into the ground, the airplane nosed over, and came to rest inverted. Examination of photographs revealed substantial damage to the fuselage, wings, and vertical stabilizer. The pilot reported that there were no mechanical malfunctions or failures with the accident airplane.