Encourage Math for Every Student!
Challenge Events Worldwide Since 2013
"One of the biggest outcomes from the Washington State Algebra Challenge was the fact that mastery of linear equation-solving was reached in 1.5 hours, not just by higher grades, but even in elementary school. More importantly, this mastery was achieved by practically the entire classroom, as opposed to just a few students. This is shockingly good, but we think we can do even better."
Director, Center for Game Science
Designed with standards in mind
Riddle Books is aligned to a number of the Common Core Standards by the Center for Game Science at the University of Washington. You can also review the problem types.
Riddle Books also features linear progression with some adaptive learning elements. Every student will progress through each of the problem types. Older students will likely progress more quickly although it may take them a while to master setting up the models (this is both the fun and the challenge for many of the problems).
See what participating Algebra Challenge teachers have said!
"My students are thinking more than they ever have! We are loving the word problems and figuring out the equations. I have kids who would not have even been willing to attempt a word problem who are now very engaged, frustrated, and victorious as they begin to figure them out." - Barbara McFall