It is a free site that can help produce quizzes for any subject or class level or use quizzes produced already from other educators. The quizzes could be used as supplemental assignments or review...
This unit available can easily be integrated into our middle school health class. The "course" was prepared by a nutritionist and includes videos, transcripts, and quizzes
This is a really fun quiz site where you can make your own quizzes and they are presented in trivia-game format. The faster students answer, the more points they get. They also use memes to make them funny and interesting for the students.
I wish I'd known about this collection of OERs during the last school year! They feature clear navigation, plenty of graphics, and sub-collegiate reading levels. Some lessons include interactives and quizzes as well. GCFLearnFree offers many topics, but this will link you to its page of technology-related items. Some, like "Typing Tutorial" or "Using Information Correctly" would be perfect for students to work through independently. Others, like "Google Drive and Docs" would be appropriate for students or staff development.