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.

Eileen Lorenz is the Project Director of the K-5 Chinese FLES Project at the Center for Applied Linguistics in Washington DC. Eileen has served as an elementary school principal, an elementary foreign language immersion specialist, and a French immersion classroom teacher. Among her duties she has had major responsibilities in the development and implementation of a Chinese immersion program. Eileen has served as president of the National Network for Early Language Learning (NNELL) and as the advocacy chair. She has a BA in French with a minor in Education and Spanish, and a Masters of Education in Human Resource Development with a specialty in adult learning.

Shuhan C. Wang (Ph.D., University of Pennsylvania) is Executive Director for Chinese Language Initiatives at the Asia Society, whose mission is to expand and strengthen the Chinese language field in the United States. Shuhan was the supervisor for World Languages and International Education for the State of Delaware and directed the Chinese Teachers Summer Institute at the University of Pennsylvania. She is involved in numerous national and international projects and has published many articles in journals and books. She is leading an international effort in developing Flying with Chinese, a Chinese language textbook series for K-6 learners.

Wei-ling Wu (Ph.D., University of Pennsylvania) has taught Mandarin to American students in grades 6–12 for twenty years. Since 1997, she has worked with K-5 Chinese teachers in developing effective teaching techniques. She is a well-known teacher trainer in Chinese language instruction and a frequent speaker at conferences and workshops. She is the lead author of a series of K-12 Chinese textbooks: Chinese for Youth, Everyday Chinese for Children, My Chinese Book. She was also one of the six-member task force that developed the NFLC Guide for the Basic Chinese Language Program.

Nancy Rhodes has extensive experience in the field of K-12 foreign language education and works with colleagues nationally to encourage long-sequence language programs that promote high levels of proficiency. At the Center for Applied Linguistics she is involved in language research, test development, and teacher training, with a special focus on the elementary school level. She is a founding member of the National Network for Early Language Learning, and served as its first Executive Secretary.

Lynn Thompson is a Research Associate in the Foreign Language Education Division and Coordinator of services for foreign language programs at the Center for Applied Linguistics. She has over 20 years of K-12 foreign language test development experience and 15 years as a teacher trainer and workshop facilitator.

Lupe Hernández-Silva, Administrative Assistant for the Foreign Language Education Division at the Center for Applied Linguistics, is the Program Assistant for the Chinese FLES Project. She has worked for over 20 years with organizations such as the National Clearinghouse for Bilingual Education, Inter-America Research Associates, and the Center for Applied Linguistics.

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.