Prior to the adoption of NPE, National level and State level Institutions like NCERT, NUPEA and SCERT provided support to the elementary Teacher Education particularly in the area of pre service teacher education. As per the guidelines of NPE, a Centrally sponsored Scheme of Restructuring and Reorganization of Teacher Education was approved in October 1987, thereby a third- district-level-tier i.e. District Institute of Education and Training Institutes were formed throughout the country in all districts.
In Tamilnadu, DIET is a District level Institute offering Teacher Education program to the Elementary Education. It was established in the year 1999and administered by School Education Department of Tamil Nadu through State Council of Educational Research and Training (SCERT), Chennai – 6. It is situated in the outskirts of G.Ariyur in Villupuram district, this Institute is provided with all facilities like EDUSAT, Smart class, Virtual Classrooms, ICT Class room so gastronomy needs of aspiring teacher students as well as teachers in the district.