Sergei Nesterenko is an affiliated faculty member with the SIT Graduate Institute of World Learning. He holds two Master degrees (in TESOL and Management) and has been a professional language teacher and teacher educator since 1990. As an SIT TESOL trainer he has trained over 300 teachers and coached 10 new trainers in USA, South Africa, Poland, Ukraine, Lithuania, Korea, Tajikistan and Afghanistan. Sergei also owns an International House school and an SIT TESOL training site in his native country Ukraine. Among his numerous interests are traveling, reading, contemporary art, theater, jazz and web publishing.