Dr. ZhaoHong Han is Professor of Language and Education at Teachers College, Columbia University, where she teaches graduate courses in Applied Linguistics, TESOL, and foreign language instruction. Her research interests are broadly in second language learnability, second language teachability, and their interface. Her work on fossilization, crosslinguistic influence, corrective feedback, second language thinking for speaking, second language reading and vocabulary development, second language reading instruction, and second language ab initio input processing has appeared in a variety of journals and books. Dr. Han is the recipient of the 2003 International TESOL Heinle and Heinle Distinguished Research Award, and a repeated recipient of the Teachers College, Columbia University Outstanding Teacher Award.
Dr.Han has served on the editorial boards of Applied Linguistics (Oxford; also as representative of the American Association for Applied Linguistics), GRETA Journal (Spain), Vigo International Journal of Applied Linguistics (VIAL, Spain), Foreign Language Teaching Theory and Practice (外语教学理论与实践, China), Chinese Journal of Applied Linguistics (formerly 中国英语教学; China), Chinese as a Second Language Research (Moulton de Gruyter), Language Teaching (Cambridge University Press), Second Language Learning Research （第二语言学习研究，China). She frequently consults to universities and school districts on research and teacher development grants and second language programs, curriculums, and materials.
Dr. Han has lived and taught in China, Italy, Norway, United Kingdom (Scotland, England), Japan, and Spain.
Dr. Lening Liu is Professor of East Asian Languages and Cultures and Director of the Chinese Language Program at Columbia University. In addition, he is the Director of the Confucius Institute and serves as co-director of the TCSOL Program with Dr. Han.
Dr. Lening Liu was born and raised in Xi’an, China. In 1977, right after the Cultural Revolution, he entered college as part of an extremely select group of students to finally end years of disruption of higher learning in China. After receiving a BA in Chinese Language and Literature from Shaanxi Normal University in 1982, and a MA in History of Chinese Language in 1985, he came to the United States in 1990 and studied linguistics at the University of Florida. He joined Columbia’s faculty in 1995 and received his Ph.D. in 1996. Liu’s research interests are in the areas of historical syntax, discourse grammar and Chinese language pedagogy. He has published a number of articles on the evolution of Chinese conjunctive adverbs, the rhetorical structures of Chinese, the history and innovation of Chinese pedagogy, etc. Courses he has taught include Introduction to Classical Chinese, Readings in Classical Chinese, History of Chinese Language, Educational Chinese Linguistics, Chinese Language Pedagogy and all levels of Modern Chinese. Currently, Liu is Professor of East Asian Languages and Cultures and Confucius Institute Director of Chinese Language Pedagogy.
Dr. Vivian Lindhardsen is the director of the TESOL Certificate Program and the Community Language Program at Teachers College, Columbia University, and she teaches Grammar and Assessment courses in the TESOL and Applied Linguistics Program at TC. Dr. Lindhardsen’s main research interests include second language assessment and pedagogical approaches to teaching and assessing writing. She is currently a commissioner of the CEA (Commission on English Language Accreditation) and a member of the PRAXIS ESOL National Advisory Committee (NAC) at ETS.