Free Math Game Apps April 13th-16th only! By McGraw-Hill for Ipod Touch & Ipad

McGraw Hill states the following on Itunes app website: All of our Everyday Math Games Apps are available for FREE download during NCTM April 13-16 2011!
http://itunes.apple.com/us/app/everyday-mathematics-divisibility/id428594346?mt=8#
I found 10 free apps by clicking on view more by this developer. When it opens in iTunes click see all, and then download all the free games.