20180120001029I

During flight training the student was to perform his first takeoff. As the aircraft taxied into position on runway 7, the instructor noticed that the student had dropped his heels to the floor and that his size 13 shoe came about midway up the pedal. Upon initiation of the takeoff roll and during the first 100 the instructor stated the aircraft was on centerline. The aircraft then began to drift to the left and the instructor verbally prompted the student to go right, followed shortly by applying pressure on the bottom of the right rudder pedal. The instructor felt resistance to the pedal movement. The aircraft continue to move left. The instructor said, let go I have the aircraft. The instructor had to remove the students hand from the throttle and moved it to idle. At that time, the aircraft continued to move left and the instructor pushed hard on the right pedal feeling resistance. The instructor then realized the student had not removed his feet from the rudder pedals. As the instructor pushed hard on the right pedal, the student's left pedal was moving aft into his foot and putting pressure on the left brake. The aircraft decelerated and departed the pavement on the north side at something less than 20KT rolling into the grass with the engine at idle. The tower was notified by the aircraft that the instructor and student were okay and shutdown the aircraft. No one was injured and the aircraft sustained no damage. The local FBO assisted and pushed the aircraft onto taxiway d. the aircraft restarted and taxied to the FBO.