Senior Instructor, Idea Math, Lexington, MA and Feng's Math, Plano, TX (2007-Present)
Mathematics Professor, Oklahoma School of Science and Mathematics (OSSM) (1991-2007)
Member, MathCounts Question Writing Committee (2005-2008)
AP Calculus Reader, Educational Testing Service (ETS) (2000-2002)
Instructor, AwesomeMath Summer Program (2008, 2009)
Ann Simmons Alspaugh Faculty Award, OSSM (2005)
Faculty, Mathematics Olympiad Summer Program (MOSP) (2002)
Mathematics Mentor, Study of Exceptional Talent (SET) at Center for Talented Youth (CTY), Johns Hopkins University (JHU) (1994-1998)
Curriculum Writer, CTY Young Student Summer Math Program (1995)
Instructor, CTY Summer Program (1993)
MAA Sliffe Award winner for Distinguished Teaching (1992)
Member, Mathematical Association of America (MAA), and National Council of Teachers of Mathematics (NCTM) (1990-2007)
Visiting Scholar, Study of Mathematically Precocious Youth (SMPY) at Johns Hopkins University (JHU) (June 1990 - July 1991)
Senior Coach, China Mathematics Association Olympiad Committee (1988-1990)
Chief Instructor, Tianjin Mathematics School, Tianjin, China (1980-1990)
The Excellence in Mathematics Teaching Award, Tianjin, China (1980, 1982, 1984)
The Science and Technology Nurturer Award, Tianjin, China (1986, 1988)
Senior Lecturer, Hong Qiao Teacher Institute of Advanced Studies, Tianjin, China (1985-1990)
Teacher, Middle/High School, Tianjin, China (1964-1985)
B. S. in Mathematics, East China Normal University, Shanghai, China (1959-1964)
Senior Instructor, Idea Math, Lexington, MA and Feng's Math, Plano, TX (2007-Present)
Mathematics Professor, Oklahoma School of Science and Mathematics (OSSM) (1994-2007)
Coach of MathCounts, American Math Contests 8, 10, and 12 tests (AMC 8, AMC 10, and AMC 12), Math League Contests, American Invitational Mathematics Exam (AIME), and American Regional Math League (ARML) (1990-Present)
Instructor, Awesome Math Summer Program (2008, 2009)
Outstanding High School Teacher Award, University of Chicago (1999)
Teacher, Especially Influential in Student Development, Massachusetts Institute of Technology (MIT) (1998)
Teacher, Most Influential in Development of Student Scientific Career, Westinghouse Science Talent Search (1998)
Who’s Who Among America’s Teachers (1998, 2002, 2005, 2007)
Chief Instructor, Tianjin Mathematics School, Tianjin, China (1980-1990)
Research Fellow/Supervisor(Math), Center for Teaching and Research, Hong Qiao, Tianjin, China (1980-1990)
Outstanding Instructor Award, Tianjin, China (1987, 1989)
Teacher, Middle/High School, Tianjin, China (1964-1990)
B. S. in Mathematics, East China Normal University, Shanghai, China (1959-1964)