From an initial collaboration sparked with 12 schools in 1998, the CAP LTER Ecology Explorers program has expanded to include 29 schools and 41 teachers drawn from elementary, middle, and high schools. Two previous Schoolyard LTER Supplements have supported popular summer workshops and internships that engage numerous teachers in our schoolyard sampling protocols for the vegetation survey, ground arthropod investigation, bird survey, plant/insect interaction study, and the canal sampling study.