GECCo was designed for Junior and Cadette Girl Scout troops. Using the patch structure used in Girl Scouts, the TERC team developed six patches focused on energy conservation topics. Troops were expected to complete three patch activities and an additional “Energy Challenge” activity in order to earn each patch. Initially, 65 troops were recruited for the Field Test. Of those, 44 troops (38 Juniors and 26 Cadettes) completed the patches. Most troops who dropped out did so due to competing activities rather than because of a lack of interest. A total 483 girls (326 Juniors and 157 Cadettes)