These word problems focus on various math skills. I have my kids play in groups of three. These games also promote working together, let's face it our kids need practice with this as well. My kids ask to play these games during inside recess!! You can order these by grade and by skill. If we are working on multiplication. I just pull out the multiplication stack of cards and they play. Here is the address if you want to check them out. http://www.frog.com/fclg/index.html
If you want to check out more ideas from other teachers click on Amber's link from Synonym Rolls & Antonym Moments.