I am Ram Chandra Dhakal, Working at Curriculum Development Centre as Mathematics curriculum officer since 2020 September. School level mathematics Curriculum development, textbook writing, teacher guide writing and other resource materials development are the responsibility of my job. I had post-graduate degree on Mathematics education from Tribhuvan University Nepal 2006. Also, I had another post-graduate degree on international education course from Naruto University of Education Japan on 2020. This paper is developed by the Master's thesis of the first author and some parts of it can be found on https://core.ac.uk/download/pdf/288300746.pdf.