This week, 100Kin10—a national network with a goal of training and retaining 100,000 excellent K–12 science, technology, engineering and math (STEM) teachers by 2021—announced a key milestone during the organization’s annual partner summit at the San Diego Zoo:

San Diegans Ernest and Evelyn Rady have made a record-setting commitment in support of the San Diego Zoo’s Animal Ambassador program. The Radys have pledged $20 million, of which $15 million will be a challenge grant that must be earned with matching donations from other Zoo supporters.