Open Courses Replace Commercial Textbooks – Lumen Learning publishes open courses to make it easier for faculty members to adopt and teach with open educational resources (OER). And to make education more affordable for thousands of students every year. Lumen offers free access to CC BY-licensed open courses in 30+ high-enrollment subjects across many disciplines. Open courses are effectively a complete textbook replacement. Each course includes a complete set of OER-based readings and sample assessments. All courses include some level of built-in video delivery and interaction. This is the starting point. From there, instructors may teach the course as-is or further adapt the course structure and content to fit their teaching style and students’ needs.