"Open Educational Resources (OER) are teaching and learning materials that you may freely use and reuse at no cost, and without needing to ask permission" (Open Educational Resources).
Blended Learning Universe: provides a comprehensive overview of various blended learning models, offering insights, resources, and strategies to integrate online and in-person learning effectively.
CK-12 Foundation (Student) (Teacher): an online platform offering free, customizable educational resources, including textbooks, interactive lessons, and practice tools, across a wide range of K-12 subjects.
Creative Commons Search: a tool for discovering openly licensed and public domain content, including images, audio, and other media, for free and legal use.
Curriki: an open educational resource platform that enables educators to create, manage, and share interactive and engaging digital learning experiences for free.
Edutopia: an educational resource hub providing research-based strategies, articles, and videos to support innovative teaching and learning practices.
HathiTrust: a digital library that provides access to millions of digitized books, journals, and other scholarly materials, primarily from research libraries and institutions.
HippoCampus: a free, open educational resource offering high-quality multimedia content, including videos and interactive lessons, across various middle school, high school, and college subjects.
Khan Academy: a free online learning platform offering personalized lessons, practice exercises, and instructional videos across a wide range of subjects for learners of all ages.
Library of Congress: serves as the digital gateway to the U.S. Library of Congress, offering access to its vast collections, resources, and services related to American history, culture, and scholarly research.
LibriVox: is a free online platform that offers public domain audiobooks read by volunteers, making classic literature accessible to everyone.
MIT OpenCourseWare: a free, open educational resource providing access to a vast collection of course materials from MIT’s curriculum, covering a wide range of subjects for self-paced learning.
OER Commons: a comprehensive online library of open educational resources, enabling educators and learners to discover, create, and share free teaching and learning materials.
OpenStax: a nonprofit educational platform offering free, peer-reviewed, openly licensed textbooks and resources for high school and college students.
PhET Interactive Simulations: is an educational platform offering free, interactive science and math simulations that help learners explore and visualize complex concepts.
Smithsonian Learning Lab: an online platform that provides access to a vast collection of digital resources, enabling educators and students to create, share, and explore personalized learning experiences.
Ted-Ed: an educational platform offering free, animated videos and lessons on a variety of topics, designed to engage and inspire learners of all ages.
W3Schools: an educational website that provides tutorials, references, and interactive coding exercises for web development technologies such as HTML, CSS, JavaScript, and more.
WolframAlpha: provides free access to educational tools, computational knowledge, and interactive resources to enhance learning in various fields, including mathematics, science, and engineering.