Webcasts for an introductory course in Geotechnical engineering. These materials are designed to align with the text "Geotechnical Engineering: Principles and Practices" 3rd edition by Coduto, Yeung & Kitch (Pearson, 2011, ISBN: 0-13-236868-4). The webcasts were developed for CE 325/326: Geotechnical Engineering I & II at Cal Poly Pomona, and CENG 3341: Introduction to Geotechnical Engineeirng at Angelo State University but can be used for any introductory geotechnical engineering course. Playlists are organized by chapters in the text book which is abbreviated CYK (2011).