picture , is believed to show disgraced principal andrew barr surfing for pornography while on-the-clock .
in the picture taken through a window , the man has his back to the camera and graphic images can be seen on his computer screen .
mr barr resigned from his position at the geelong college after an investigation , which included a search of his computer , after the photograph appeared on snapchat .
mr barr has made an enduring contribution to the college 's educational vision and future planning .