In co-operation with the Foundation for International Education (FIE: accredited by the Ministry of Education, Japan), NIC provides a professional development program for Japanese high school teachers.

Since 1998, courses of English teaching methodology and oral communication development have been offered to the Japanese English teachers and teachers' candidates. The teachers development program has recently been recognized by many Local Education Authorities in Japan, and further development of the program is on its process in conjunction with FIE.