DIET provides residential facility to both Pre-service and In-service trainees. Each DIET comprises the following seven academic branches.

• Pre Service Teacher Education Branch (PSTE)
• Work Experience Branch (WE)
• District Resource Unit (DRU)
• In-service Programmes, Field interaction and Innovation Co-ordination Branch (IFIC)
• Curriculum, Material Development and Evaluation Branch (CMDE)
• Educational Technology Branch (ET)
• Planning and Management Branch (P & M)

A DIET has three main functions

• Training (Pre service and In-service)
• Resource support
• Action Research

• Offering in-service and pre-service education
• Developing district specific academic curricular materials
• Providing resource support to SSA training programmes
• Providing resource support to alternative schooling (AIE / EGS)
• Encouraging innovation and experiments in the field of education
• Initiating collaborative Action Researches and district level Research Projects to address the quality concerns
• Improving the quality of Laboratory Schools by adopting and providing academic interventions
• Sustaining quality of elementary education in the district level by organizing district specific programmes under centrally sponsored plans
• Organising School Adolescence Education Programme (SAEP) for the students of classes IX and XI for Life Skill Development in collaboration with NACO and TANSACS and UNICEF
• Conducting the population education programme for NCERT
• Organising activities initiated by RIE, Mysore, RIESI, Bangalore, NCERT, NUEPA, etc.
• Organising EDUSAT programmes for educational purposes
• Preparing audio and video packages for effective classroom transaction
• Inculcating the value of dignity of labour and work culture among teachers.