ABSTRACT:Responding to the increasing math and science teacher shortage in the United States, this study intended to determine which science, engineering, and math (SEM) majors during which years in their undergraduate education and from which academic performance levels are most interested in K-12 teaching. Results may aid policymakers and practitioners in making most effective use of this traditional undergraduate candidate pool when designing K-12 science and math teacher recruitment programs. A survey of SEM majors from two research-oriented, urban universities is used to assess participants' interest in K-12 teaching both compared to other career choices and in isolation. Results indicate that the more successful targets for K-12 teacher recruitment include (1) SEM undergraduates in their junior and senior years independent of SEM major, (2) SEM undergraduates with midacademic performance levels independent of SEM major and academic year, and (3) math majors followed by natural science majors and, as least promising targets, engineering majors. Results remain independent from gender and ethnicity variables.