Free iPad app: https://itunes.apple.com/ca/app/virtual-manipulatives!/id471341079?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/app/id578535453?mt=8&uo=4&at=10l6SU
Free iPad app: http://itunes.apple.com/us/app/math-pro!!!/id537249122?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/math-pro!!!/id537249122?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/buzzmath-middle-school/id593186620?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/mathlands-kids-logic-game/id489905188?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/singapore-math-bar-models/id461710600?mt=8&uo=4&at=10l6SU