ThatQuiz.org is a fun little site that offers various customizable quizzes covering Math, Geography, Science, & Vocabulary. Each quiz can be customized to set the time, the level of difficulty, whether the site offers feedback, and more.
This site offers a great opporitunity for instructors to have their students review a large variety of subject matter for different class subjects. This site is great for "POD" or beginning of the class activities, classroom review sessions & Games, or even an activity to work on to review for a test.
ThatQuiz.org to be used as a sole teaching tool. This will never replace class instruction and class practice. However, it is a great review site, time filler, or fun website students can navigate in their spare time.
Check out thatquiz.org