• Psycho linguistics
• Second Language Teaching and Learning
• Socio linguistics
• Applied Linguistics

• Communication for Engineers
• English for Professional World
• Academic English
• Communication skills

Abstracts

• P.N Gardihewa, [2016],Mother tongue interference on English as a second language on Undergraduates` writing, Second International conference on Linguistics in Sri Lanka, University of Kelaniya.
• P.N Gardihewa, [2016],Feasibility of introducing sole English medium instruction in Social Sciences, 9th International Conference, Kothelawala Defence University.
• P.N Gardihewa, [2016],Obstacles in Introducing English as the sole medium of instruction in Social Sciences,, International Conference on the Humanities 2016, Universiy of Kelaniya.
• P.N Gardihewa, [2016] Students` attitudes and preferences towards sole English medium instruction in Social Sciences. International Postgraduate Research Conference 2016, University of Kelaniya.
• P.N Gardihewa, [2016] A study on the contribution of task based language teaching towards the enhancement of the students` oral skills in English. , The Third International Conference on Linguistics in Sri Lanka 2017, University of Kelaniya.
• P.N Gardihewa,[2018], Effectiveness of turn taking and group work in reducing speaking anxiety in ESL classrooms, Conference South Asia Conference of Multidisciplinary Research 2018.
• P.N. Gardihewa, D.P.S. Wijesinghe, [2019], Reasons for the difficulties to acquire language skills; With reference to the first year undergraduates in the Faculty of Engineering, Asia International Conference of Multidisciplinary Research 2019, Colombo, Sri Lanka (ISBN 978-955-3751-01-0) pp 13.
• Prathibha N. Gardihewa, [2020], Investigating English literacy and English needs of engineering undergraduates, Online International Conference on Social Sciences, Humanities and Management Studies (ICSHM-2020), Lisbon, Portugal, 2020.
• Prathibha Nirmani Gardihewa,[2020], Confrontations Of Online Leaning Emerged Due To Covid-19 Pandemic: With Reference Faculty Of Engineering, University Of Ruhuna, Global Conference in Advances on Education and Research, (GCAER-Online),Japan, 2020
• Prathibha Nirmani Gardihewa,[2020], Escalation of online shopping amidst Covid-19 outbreak, Global Conference in Advances on Business and Social Sciences, (GCABSS-Online), Japan, 2020
• N Gardihewa,[2021], Students’ perspectives on the challenges encountered due to online learning, Rajarata University International Symposium on English Language Teaching (RUISELT 2021), Online, Sri Lanka, 2021.

Full Papers

• Prathibha N. Gardihewa, Praneeth S. Wijesinghe, [2019], Reasons for the difficulties to acquire language skills; With reference to the first year undergraduates in the Faculty of Engineering, Conference Proceedings of Asia International Conference of Multidisciplinary Research 2019, Colombo, Sri Lanka (ISSN:2682-7271 online) pp 31-36
• P.N Gardihewa, [2016],Feasibility of introducing sole English medium instruction in Social Sciences, Proceedings in Management, Social Sciences and Humanities, 9th International Research Conference-KDU, Sri Lanka
• Gardihewa, Prathibha Nirmani [2014/2015], Use of Poetry in Second Language Teaching and Learning. Prabha, Faculty of Humanities, University of Kelaniya

Journal Articles

• Gardihewa, P.N, The Impacts of Cooperative Learning on Demoting Communication Anxiety: With Special Reference to Engineering Undergraduates ,Sri Lanka Journal of Social Sciences and Humanities Volume 1 Issue 1, February 2021: 13-22 ISSN: 2773 692X (Online), 2773 6911 (Print)
• Prathibha N. Gardihewa, Investigating English Literacy and English Needs of Engineering undergraduates, Turkish Online Journal of Qualitative Inquiry (TOJQI) Volume 12, Issue 3, June 2021: 884-892 ISSN: 13096591 (online) [Scopus Indexed Journal]

• Gold medallist for the best performance in English, 2015, Sabaragamuwa University of Sri Lanka, Faculty of Social Sciences and Languages.