- The International Childrens Digital Library: en.childrenslibrary.org
- Unite for Literacy: uniteforliteracy.com
- Storyjumper: www.storyjumper.com/book/
- Project Gutenberg: www.gutenberg.org
- Gismo Freeware: www.techsupportalert.com/free-
- Free digital books are available at Bookshare - www.bookshare.org/cms/
- Poetry-Free-for-All: for poets of all ages: www.everypoet.org
- The Story of Life, from the Big Bang to You: Written for middle- and high-school students (with illustrations by Ingrid Johnson), this is a comprehensive history of the origins of the solar system, the Earth, and life on Earth (originally published by Holt, Rinehart, & Winston, the updated 2019 edition is open source) bit.ly/38ZI6ov
