Kumari, H. M. L. (2021) “A Study on Instructional Supervision by Principals in Type 2 and Type 3 schools in Sri Lanka”.  Paper published at the 1st International Research Symposium on Interdisciplinary Research in Education Organized by Faculty of Education, University of Colombo, Sri Lanka,  Page No. 176-185,  ISSN:978-624-5873-12-8 , Available at online:  http://edu.cmb.ac.lk/proceedings-irs-2021/