What is the difference between ZTC and OER?
ZTC stands for Zero Textbook Costs and when a class is designated as ZTC it means that students will pay no additional fees for learning materials for this course. However, ZTC does not mean all learning materials in the course are open or free. Examples: ebooks or streaming videos the college library has purchased that are available through library databases to currently enrolled students.
OER stands for Open Educational Resources. These are openly licensed (most often through Creative Commons) and are free meaning anyone can access them for free online. They are available to edit, remix, rework, etc. All OER are ZTC.