might I suggest that the cessna was flying so slowly by the time the instructor took control that nothing he could do would have avoided the prang.
not that it matters but I don't agree with the analysis by centaurus.
the prang was the result of gross stupidity by the flying instructor.
the instructor should have flown the aircraft out well clear of the circuit and at a reasonable altitude before ever letting the newbie touch the controls.
flossing on about stall recovery technique, wing misrigging etc is to totally miss the point in my opinion. the aircraft should never have been in the situation in the first place.
btw back in the day the picking up of a wing with use of rudder in a slow aircraft was used to build handling skills and controls familiarity. IT WAS NEVER USED during a stall.
gently gently with feeling, make tender love to the aeroplane my boy don't rape it, was the sentiment....and occasionally the comment.