Center for Language Studies (CLS) organized a webinar on mixed-method research design, titled “Mixed Methods Research Design: Instrument Development” on August 27, 2020, in Zoom. Dr. M. Moninoor Roshid, associate professor of English Language Education in the Institute of Education and Research (IER), University of Dhaka, facilitated the webinar. Dr. Rashid has completed his Ph.D in (Teaching English as a Second Language (TESL) at Monash University. Melbourne, Australia. He has several publications focusing on English as lingua franca, international business communication, material development, discourse analysis, graduate’s employment, and university-industry partnership published by Sense, Routledge, Springer, Multilingual Matters, and Cambridge Scholars. This webinar focused on different ways of gathering information for mixed-method research. The speaker explained the principles of constructing an effective questionnaire, observation checklist, interview question, FGD and test developing. Sample speaking test questions and rubric and assessment score sheets were shown, which can be used for evaluating learner performance. It provided the participants with guidelines for developing research tools by keeping the type of participants, background, goal and design. The question-answer session created valuable opportunities of not only making queries but also sharing experiences of the attendees. Educators, researchers and students from different disciplines participated in the workshop.