This document outlines research methodology for collecting quantitative and qualitative data in English language teaching. It discusses various quantitative data collection methods like sampling, questionnaires, experiments, and collecting data online. It also discusses qualitative data collection methods like sampling in qualitative research, ethnography, interviews, focus groups, introspective methods, case studies, diary studies, and maintaining research journals. The document provides details on how to conduct each of these methods and their respective strengths and weaknesses.