Number Theory Games

This week:  Number Theory Games!  It has been a good change for the students and me.  These are part of "Prime Time" and "Accentuate the Positive" (CMP).  I wish this school had CMP as the adopted text.  We can do the class activities but without photocopying many pages (probably against copyright law) we can't do the homework followup.  I was surprised at the positive reaction of the students to the games.  In addition to the change of pace, it showed (at least to me) how a more problem-based classroom diffuses some of the behavior issues.

Factor Game - this game allows students to practice finding factors to numbers through 30.  It also requires students to think about the relationships of the numbers and encourages faster recall of basic multiplication facts.
Online version:   http://illuminations.nctm.org/ActivityDetail.aspx?ID=12
Paper version:   http://illuminations.nctm.org/lessons/6-8/factor/handouts.htm

Product Game -  This game encourages students to develop a better understanding of the relationships between factors and multiples. 
Online version:  http://illuminations.nctm.org/ActivityDetail.aspx?ID=29
Paper version: http://illuminations.nctm.org/LessonDetail.aspx?ID=L272

Integer Product Game - This game extends the product game (above) to include work with integers. 
Online version:  http://connectedmath.msu.edu/CD/Grade7/IntProdGame/IntProdGame.html
Paper version:   http://blog.wsd.net/anholtry/files/2012/09/Integer-Product-Game.pdf