Copyright for Kids - http://www.copyrightkids.org
Copyright Alliance Education Foundation - http://www.copyrightfoundation.org/
Free Rice 2.0 - http://freerice.com/#/english-vocabulary/1542
Newseum - http://www.newseum.org
Plagiarism.org - http://plagiarism.org/plagiarism-101/overview/
Vocabulary Spelling City - http://www.spellingcity.com/