Lachie Burroughs, 10, rated the project a 10 out of 10.
"We can't just sit back and relax, we have to keep going because we don't have a pest fence so they can still get in."
Mr Booth hopes the project will work as a framework for other schools.
Finding native bird nests with half-eaten eggs, and spotting predator footprints were just a few of the drivers that kept the pupils motivated.
Year 1 pupils were also part of an earthlings group and have been helping to grow native trees on school grounds.
Lachie said they were teaching Year 5 pupils about the trapping to carry on the Halo project.
"The tracking tunnels have been really cool to identify footprints ... we've found hedgehogs, a mouse, rats and even stoats. It's an awesome project."
Mr Booth has gained support from Bushy Park volunteer educator Robin Paul as well as Department of Conservation community ranger Scotty Moore and Sara Threadgold, and Bushy Park Sanctuary manager Mandy Brooke.