The flight instructor, who was providing instruction in the tailwheel-equipped airplane reported that, during the landing roll, the student pilot failed to maintain directional control and the airplane swerved right and then left. He added that, during the attempted remediation of the second swerve, the tail started to rise with an "associated tire squeal." Subsequently, the propeller struck the ground and the airplane nosed over.
The airplane sustained substantial damage to the fuselage.
The flight instructor reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.
The flight instructor also reported that, it was his belief that "the student inadvertently got on the brakes."