NPE envisaged the concept of DIET to support the national and state level agencies for the qualitative improvement of elementary and adult education system. DIET provided academic and resource support at the grass root level for the success of the various strategies and programmes being undertaken in the areas of elementary and the adult educatin. DIET organises inservice programme for teachers and training programme for AE/NFE personnal.

DIET performs the following functions ::

- Pre service and inservice education of teachers for the formal school systems.

- Training and orientation of heads of institution in institutional planning and management

- Serving as evaluation centre for primary and upper primary schools as well as Non formal and adult education programme.

- Action research and experimentation work.

- Monitoring and Evaluation.

DIET performs over all responsibility for planning, monitoring and supervising all educational programmes at the district level.