SANTA CLARA, Calif.—Editor and filmmaker Christopher Rufo has been focusing his research on critical race theory (CRT) in K–12 schools for the last four months. Since California announced its ethnic studies curriculum in March, there has been much discussion on CRT, a quasi-Marxist theory that divides people by race into “oppressors” and “oppressed.” Those who oppose the ideology, such as Rufo, say it is divisive and harmful. He said he saw how the theory manifests as a curriculum and a teacher training program as well as what its effects are on kids. “First graders in Cupertino, California … are forced to deconstruct their racial and sexual identities and then rank themselves according to their power and privilege,” Rufo told NTD Television. “I did a story about middle school teachers in Springfield, Missouri, who were forced to locate themselves on an oppression matrix; and white, male, Christian, English-speaking teachers were told …