District Institute of Education and Training (DIETs) is a teacher training institution for the elementary level. It includes in service and pre -service programmes both. The main purpose of these programmes are reform the teacher’s behaviour, create awareness and responsibilities of the teacher, create suitable environment by facilitating new innovations etc. Trainees, teacher educator’s perception on effect of these programmes are important aspect for research. So the main purpose of this paper is to study the trainee’s perception on effect of DIETs at Azad DIET College in Lakhimpur District of Assam.