Open educational resources are teaching, learning, and research resources that are created with the intention of being freely available to users anywhere. They may include, but are not limited to, textbooks, readings, multi-media files, software, assessment tools, and even entire courses. Most are covered by licenses that allow for using, re-mixing, and sharing. This page provides links to jus…
Before new interventions are released into disease control programmes, it is essential that they are carefully evaluated in `field trials'. These may be complex and expensive undertakings, requiring the follow-up of hundreds, or thousands, of individuals, often for long periods. Descriptions of the detailed procedures and methods used in the trials that have been conducted have rarely been publ…
Elementary Algebra is licensed under a Creative Commons Attribution 4.0 International (CC BY) license, which means that you can distribute, remix, and build upon the content, as long as you provide attribution to OpenStax and its content contributors. Because our books are openly licensed, you are free to use the entire book or pick and choose the sections that are most relevant to the needs o…
Prealgebra is designed to meet scope and sequence requirements for a one-semester prealgebra course. The book’s organization makes it easy to adapt to a variety of course syllabi. The text introduces the fundamental concepts of algebra while addressing the needs of students with diverse backgrounds and learning styles. Each topic builds upon previously developed material to demonstrate the co…
"The author of this text has intentionally kept it general in nature in order to create a platform for those who want to expand content into more in depth studies of the mentioned concepts and traditions. I believe that appreciation of any subject comes from open-minded exposure to that topic. With the arts this generally must happen at a moment when the message and meaning of the work resonate…