The project is part of America's Great Outdoors initiative, announced by President Obama last year.
More than 200 students in grades six to nine took part in eight projects, including some students who removed invasive plant species to help the habitat for the endangered mission blue butterfly.
"They're actually doing something to save an endangered species and they've learned about the whole ecosystem and why it's important to take care of every living thing in our ecosystem," said Conservation Corps North Bay CEO Marilee Eckert.
Students in other areas removed litter in Crissy Field, pulled weeds in Fort Baker and worked on the nursery in Muir Woods.
