Door 24 is fantastic iPad app for learning computational fluency in 4th-8th grade Math.  This game has students trying to solve the mystery behind Door 24 while completing Math equations that focus on a wide range of problems (i.e. division, multiplication, order of operation, etc).  W/ their unique reward system, multiple endings, and engaging narrative makes for a fun/high replay value game.  Best of all, is the Math review screens that help students learn how to solve the problems they got wrong.I highly recommend checking out Door 24 by clicking here!!!
*Door 24 is an advertiser of Technology Tidbits.