If you need content for your course there is a wealth of it available that is free or low in cost. Many types of materials are available including textbooks, images, simulations, government information and videos. These resources are called Open Access Resources (OAR) or Open Educational Resources (OER). Such resources are according to Educause teaching, learning and research materials that have been released under an open licensing agreement such as Creative Commons.
Why use open access materials? They are often free or low-cost and do not require copyright permission. Student textbook cost continue to rise and open access textbooks will save your student's money while still providing them with high-quality materials. They can supplement library resources and save you the time and effort of creating materials. One type of material that can require costly software and a great deal of time would be simulations for the sciences. There are sites were you can obtain previously created simulations and embed them in your course.
When using open access content keep in mind your learning objectives for the course and choose materials that will help you meet those objectives, select materials from a peer-reviewed repository, and read the license for materials carefully and attribute to the source when using.
Here is a quick listing of some of the materials available--
Open Textbook Library
Free Educational Materials of all kinds
There are many more besides these and the Faculty Development Center will be happy to share them with you. We even have a webinar on this topic. Feel free to contact me at firstname.lastname@example.org to learn more.