This is a fantastic website that we use for our K-5 instruction at WWA. It allows the students to compete against one another in a variety of activities and challenges. The website is kid-friendly, free of advertisement and best of all free to use!
The website was originally born as a side project in the research department of the University of Kansas School of Education with funding from a NSF grant. The website began as the idea of Dr. Jerry Chaffin who believes that students in rate-based math practice would lead to higher fluency and automaticity. The multi-player competition engages students and pushes them to achieve.
You can locate the website at Arcademic Skill Builders