Hay suffered a serious concussion which has affected his ability to concentrate and chipped the bone in his ankle which had reduced his mobility.
Principal Garry de Thierry had initially hoped Hay would be back in a week, then later at the start of Term 2.
But he had previously told the Rotorua Daily Post he was unsure if Hay would be back this year.
A police summary of facts said Tawhiti-Ormsby was a passenger in a Toyota vehicle at the school about 3pm. The area at this time was busy with many young people around being picked up.
As Tawhiti-Ormsby left the school, Hay asked him to follow the flow of the traffic. The driver refused. Hay then grabbed his mobile phone and took a photo of their Toyota vehicle.
The summary said Tawhiti-Ormsby then got out of the vehicle and "charged" at Hay, punching him in the face with a closed fist which caused him to stumble and fall on the ground.
If you know where Tawhiti-Ormsby is, contact Rotorua police on (07) 348 0099 or the anonymous Crimestoppers line on (0800 555 111). Ring 111 if it's an emergency.