This document provides an introduction to educational research. It discusses why educational research is important, including to improve practice, add to knowledge, address gaps in knowledge, expand knowledge, replicate findings, and add voices to knowledge. The document also outlines the basic types of research: quantitative research uses statistics and is best for "what" questions; qualitative research uses descriptive analysis and is best for "how" and "why" questions; and mixed methods combines approaches. Finally, it emphasizes the importance of distinguishing between primary and secondary sources of research.