What happened
During the takeoff roll phase of a touch-and-go maneuver, the student pilot receiving instruction inadvertently operated the landing gear handle rather than the flap handle. As the Cessna (type not specified in source) continued its roll, the nose gear and the left main gear retracted.
The certified flight instructor reported that he attempted to grab the handle immediately upon seeing the student move it, but the retraction had already occurred. The aircraft was not injured in terms of occupants, as no fatalities or injuries were reported in the source text.
The investigation
A post-accident examination of the aircraft revealed no mechanical failures or malfunctions within the landing gear system. The instructor also confirmed that no mechanical issues or malfunctions were experienced during the flight.