1. Department of Science and Environment Education, Faculty of Education, Tribhuvan University , Kathmandu, Nepal
2. Department of Health and Population Education, Faculty of Education, Tribhuvan University , Kathmandu, Nepal
3. Department of Educational Sciences, Faculty of Science and Technology, Norwegian University of Life Sciences , Ås, Norway
4. Department of Health and Population Education, Mahendra Ratna Campus, Tribhuvan University , Kathmandu, Nepal