1. D.O. education, Statistics and School Performance Indices, Department of education, 2019. https://doenets.lk/statistics. Accessed 27 July 2020
2. Majeed, M.N.A.: ResearchGate, 2016. https://www.researchgate.net/publication/328627518_challenges_faced_by_students_in_english_medium_undergraduate_classes_an_experience_of_a_young_university_in_sri_lanka_introduction. Accessed 27 July 2020
3. Caro, K.: Lexis, lexical competence and lexical knowledge: a review. J. Lang. Teach. Res. 8(2), 205 (2017)
4. C. University, Cambridge University Press 2020. https://www.cambridge.org/cg/cambridgeenglish/catalog/cambridge-english-exams-ielts/tkt-course-kal-module. Accessed 27 July 2020
5. Heni, N., Hamam, H.: Design of emotional educational system mobile games for autistic children. In: 2016 2nd International Conference on Advanced Technologies for Signal and Image Processing (ATSIP), pp. 631–637. IEEE, March 2016