This guide serves to provide you with a starting point in deciding if open source is suitable for your classroom environment and links to many of the resources available.
Open Source Definition from the OER Commons website: Open Education Resources (OER) are teaching and learning materials freely available for everyone to use, whether you are a teacher or a learner. This includes full courses, modules, syllabi, lectures, homework assignments, quizzes, lab activities, pedagogical materials, games, simulations, and many more resources contained in digital media collections from around the world.
The Texas Education Code, (TEC) §31.002 defines Open-Source Materials as electronic textbooks that are available for downloading from the Internet at no charge to a student and without requiring the purchase of an unlock code, membership, or other access or use charge, except for a charge to order an optional printed copy of all or part of the textbook. The term includes a state-developed open-source textbook purchased under the TEC, Chapter 31, Subchapter B-1.
Creative Commons license (CC) explained HERE. A CC license is one of several public copyright licenses that enable the free distribution of an otherwise copyrighted work
GNU-Free Document License explained HERE. The GNU General Public License is a free, copyleft license for software and other kinds of works
Public Domain (PD) explained HERE. When a work is in the public domain, it is free for use by anyone for any purpose without restriction under copyright law. Public domain is the purest form of open/free, since no one owns or controls the material in any way.
Copyleft license: Oxford Dictionaries defines copyleft licenses as an arrangement whereby software or artistic work may be used, modified, and distributed freely on condition that anything derived from it is bound by the same condition.