Jamie Mikeska is a Managing Principal Research Scientist in the ETS Research Institute. Jamie completed her Ph.D. in the Curriculum, Teaching, and Educational Policy graduate program at Michigan State University in 2010. Her current research focuses on three key areas: (1) designing, developing, and conducting validation studies on assessments of content knowledge for teaching (CKT) science; (2) examining and understanding validity issues associated with measures designed to assess science teachers’ instructional quality, including observational measures, value-added measures, student surveys, and performance-based tasks; and (3) extending and studying the use of these knowledge and instructional practices measures of science teaching quality as summative assessment tools for licensure purposes and as formative assessment tools integrated within teacher education and professional development contexts. Prior to graduate school, she taught elementary school for five years in Montgomery County, MD and earned her National Board certification during her tenure as a public school teacher.