AP NISHTHA Module 15 Model Portfolio on Pre School Education DISKHA Module 15 Portfolio Activity explained. #NISHTHA_Module_15. Portfolio 15 Teachers Training on NISHTHA. This module provides an overview of Preschool Education -what is preschool education, why it is important, how children learn, what kind of pedagogy needs to be adopted for holistic development of children and how learning areas and a day’s schedule is planned. It focuses on experiences and activities for development of early literacy and numeracy so that children have smooth transitions to primary grades. Involvement of parents in the preschool programme is also highlighted.