Campers are grouped by grade level into teams of 10-16 that stay together throughout the week. Group names are: "Nebulas" (Kindergarteners), "Stars" (1st and 2nd graders) and "Supernovas" (3rd through 5th graders). In some cases, more than 20 supernovas have been put into one group. The teams are led by a Team Leader, who guides them through each rotation during the day. Summer Interns aid instructors in classroom and activity preparation. Lead Instructors, many of whom are classroom teachers during the school year, deliver instruction in the art, science and outdoor activities.
In 2009, Camp Galileo operated 19 camps at various campuses across the Bay Area. More children will attend Camp Galileo than any other camp in the Bay Area.