The children scoured the Rotary Park public reserve next to the school in search of rubbish for their contribution to Clean Up New Zealand week.
Deputy principal Jan Stevens said the children had fun.
"They were really good about it too because it's quite yucky doing this sometimes."
The amount of rubbish surprised her.
"At a glance, there didn't seem to be much, but when we got on our hands and knees there was heaps."
The school decided to clean up Rotary Park because it was in its backyard and was used by the children and their families.
Ebony James (9) said it was good to clean up the park because people walked their dogs there.
"Some of us also went through the school playground and picked up all the sticks ... at playtime."
The Rotary Club of Dunedin Central and supporters were out in force in Dunedin on Saturday, picking up rubbish in a section of the Kaikorai Stream and at Second Beach.
Club president Neville Hall said such events were another way for the club to give back to the community.
Three skips placed by the Saddle Hill Community Board in Brighton, Waldronville and Fairfield were filled by the community during the weekend.
Board member Scott Weatherall said the initiative received positive feedback.
"People obviously took the challenge, collected loads of rubbish and also took the opportunity to clear out their own backyards too," he said.
Items dumped included lawn mowers, a fridge and a microwave.
