Traditionally, classrooms have been the major channels of interaction between teachers and students. With the advancements in internet, social media and mobile technologies, learning environments are becoming more enriched with sophisticated interaction and a wealth of online learning material. While this offers a range of improvements, it is posing a set of challenges for educators to accommodate such changes to the benefit of their students. One particular problem is that current teachers are not well equipped with tools to guide students towards the discovery of learning material relevant to the context of their course. For example while it is easy in a classroom to discuss how a video connects to a topic or learning activity within a course, it is much harder to infer such cognitive connections in an online environment. We believe that one of the major bottlenecks is the lack of explicit context alignment between teachers, students and learning resources. We propose using semantic technologies to elicit the contexts in learning environments, and provide the means for teachers to better orchestrate the delivery of their learning concepts in classrooms. We discuss in this seminar a plan to build semantic graphs (i.e. knowledge graphs or maps) to connect existing courses, learning material and other entities involved in leaning environments. This work contributes to enhancing personalized learning, and empowering educators to have better control over learning resources to support their teaching duties.