This document provides an overview of using social media and online resources in teaching and learning. It introduces tools like Twitter, YouTube, and open educational resources (OER). Twitter can be used to search for discipline-specific keywords, follow education accounts, and find guides for teachers. YouTube contains lectures, demonstrations and talks that can be used to create new lessons or supplement existing ones. OER are openly licensed educational materials like course notes, lectures, and entire online courses that can be reused and adapted for teaching. The document provides examples of OER repositories and encourages reusing and sharing one's own teaching materials as OER to open up education.