Marcia Harmon Rosenbusch (Ph.D., Iowa State University) is the Director of the National K-12 Foreign Language Resource Center at Iowa State University. Dr. Rosenbusch directs the elementary school foreign language teacher preparation program at ISU through a joint appointment in the Departments of Curriculum and Instruction and World Languages and Cultures. In 1996 she received the Florence Steiner Award for Leadership in Foreign Language Education, and in 2001, the Anthony Papalia Award for Excellence in Teacher Education.

Holly Kaptain is a former elementary foreign language teacher who currently serves as the Two-Way Immersion Project Coordinator for the National K-12 Foreign Language Resource Center at Iowa State University. In that capacity, she coordinates teacher and administrator training in effective instruction for dual language programs and is responsible for developing curriculum, facilitating teacher training in the delivery of curriculum, and in researching and securing materials and resources for the Two-Way Immersion programs. Holly is completing her Master’s of Science in Curriculum and Instruction in the fall of 2007 and will be pursuing a Ph.D. in Educational Administration at ISU.

Mack Shelley (Ph.D., University of Wisconsin-Madison) is University Professor of Statistics, Educational Leadership and Policy Studies, and Political Science at Iowa State University. From 2003-2007, he served as Director of the Research Institute for Studies in Education (http://www.rise.hs.iastate.edu/) at Iowa State University. He has extensive experience in research design, data analysis, and evaluation, and has served as Principal Investigator, Co-Principal Investigator, and Consultant on a wide array of grants and contracts with federal, state, and local agencies, and foundations.

Claudia Navarro-Villarroel is a PhD student co-majoring in Statistics and Education (Research and Evaluation). She received her Masters Degree in Statistics at the Universidad de Valparaíso, Chile (2001). She has been working since 1994 for the Department of Statistics in the Universidad de Valparaíso. She worked as a graduate research assistant at the Research Institute for Studies in Education –RISE– in Iowa State University –ISU– (2006-2007). Currently, she is in charge of the experimental design, statistical data analysis, and evaluation of projects as a graduate research assistant at the K-12 National Foreign Language Research Center –K-12 NFLRC– in ISU.

Vicki Gray is the Administrative Assistant for the National K-12 Foreign Language Resource Center.  She has worked at Iowa State University for 18 years and has been with the NFLRC since 2003.  Vicki is actively involved in supporting the many aspects of the TWI project.

Jacob E. Larsen holds M.A. degrees in English Language and Literature (University of Southern Denmark) and Applied Linguistics (Ohio University). In the area of English language teaching he has experience with the development of advanced level courses, supervision of placement test creation, and teaching of general and specific English courses to students of all ages and levels. He is currently enrolled in the Ph.D. program in Curriculum and Instructional Technology at Iowa State University where he is a research assistant in the National Foreign Language Research Center (NFLRC) at ISU and the webmaster of the NFLRC and National Network for Early Language Learning (NNELL) homepages.