title: Class size.
authors.forename: E M
authors.initials: EM
authors.lastname: Lewit
authors.forename: L S
authors.initials: LS
authors.lastname: Baker
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D010561:Personnel Staffing and Scheduling / Q000191:economics; D012574:Schools / Q000458:organization & administration*; D014481:United States