GROB 109B MOTOR GLIDER STUDENT PLT LOST CTL DURING LNDG AND NOSED OVER CAUSING DAMAGE TO THE PROPELLER.

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I AM A FLT INSTRUCTOR AT NASHUA; NH. I HAVE A STUDENT GOING THROUGH THE GLIDER PRIVATE PLT FLT COURSE. I SIGNED HIM OFF TO SOLO ON 10/WED/02; IN THE MOTOR GLIDER AS A STUDENT PLT IN THE GROB 109B. ON 10/TUE/02; MY STUDENT WAS PERFORMING HIS SECOND SOLO GLIDER LESSON WHILE I WAS DOING A DUAL FLT WITH ANOTHER STUDENT IN ANOTHER AIRPLANE. AFTER I LANDED AND TAXIED TO THE RAMP; I LOOKED TO THE RWY AND OBSERVED THE GLIDER MY STUDENT WAS FLYING STOPPED ON THE RWY. A BUNCH OF INSTRUCTORS RECEIVED PERMISSION FROM NASHUA TWR (TWR HALTED RWY ACTIVITY) TO GO ON THE RWY TO PUSH THE GLIDER OFF. ONCE THEY PUSHED THE GLIDER TO THE RAMP; I SPOKE TO MY STUDENT TO FIND OUT WHAT HAPPENED. HE INDICATED AFTER HE LANDED; THE GLIDER SWERVED L (AS IT TYPICALLY DOES) AND HE CORRECTED TO THE R. HE PULLED THE DIVE BRAKES TO SLOW DOWN (THE DIVE BRAKES ARE INTERCONNECTED TO THE TOE BRAKES) AND APPLIED TOO MUCH OF THEM WHICH CAUSED THE ACFT TO NOSE-OVER AND STRIKE THE PROPELLER (THE GROB G109B IS A TAIL WHEEL GLIDER). AFTER THE PROPELLER STRIKE; HE SHUT THE ENGINE DOWN AND INFORMED TWR.