Hills agreed with the tribunal's penalties, which also included that he pay almost $1000 towards the cost of the tribunal hearing.
During his sentencing the court was told two teenage girls using the changing room showers at a public pool noticed a cellphone on a high ledge. They used a towel to knock the phone down, and found it was recording video.
There were three clips, ranging in length from 15 to about 90 seconds, showing girls rinsing themselves in their togs or underwear.
Forensic analysis of the phone's memory card showed an earlier video clip of two women, recorded in June and about 15 minutes long, had been deleted. It had been taken in a bathroom when the phone was hidden by a laundry basket.
Sentencing judge Grant Fraser said Hills' breach of trust was "flagrant and profound," especially from someone who was supposed to protect youngsters' wellbeing.
"The offending is inexplicable for someone in your position ... the loss of your teaching profession is an absolute tragedy considering how long you would have struggled to get yourself through university, then training college, to pursue the career you wanted," he said.
Judge Fraser said he was tempted to impose a jail sentence to denounce the offending and deter others, but that would not be in the interests of the community, Hills or his family. The community would be better served by seeing him rehabilitated and employed, though Hills himself acknowledged his teaching days were over.