Here are some great optional apps for you to consider.
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.brainium.jumbline2
Free Android Phone app: https://play.google.com/store/apps/details?id=com.brainium.jumbline2free
Free iPad app: https://itunes.apple.com/us/app/jumbline-2-free-for-ipad/id374370928?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/jumbline-2-free/id384200512?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/jumbline-2-for-ipad/id364900547?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/jumbline-2/id384197252?mt=8&uo=4&at=10l6SU
Paid Mac program: https://itunes.apple.com/us/app/jumbline-2/id429279737?mt=12&uo=4&at=10l6SU
Paid iPad app: http://itunes.apple.com/us/app/stack-the-states/id381342267?mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/us/app/stack-the-states/id381342267?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/mathmateer-free/id408770902?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/mathmateer/id393989284?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/mathmateer-free/id408770902?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/mathmateer/id393989284?mt=8&uo=4&at=10l6SU
Website: http://www.instagrok.com/
Free iPad app: https://itunes.apple.com/us/app/instagrok/id777873941?mt=8&uo=4&at=10l6SU
Google Apps for Education app: https://www.google.com/enterprise/marketplace/viewListing?productListingId=17789+13349884249762973052
Google Chrome app: https://chrome.google.com/webstore/detail/instagrok/flonaffkffjppejcafgpdgilebfikemd
Edmodo app: http://www.edmodo.com/publisher?uid=7493337
Free iPad app: https://itunes.apple.com/us/app/sushi-monster/id512651258?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/sushi-monster/id512651258?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/starfall-learn-to-read/id551817261?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/starfall-learn-to-read/id551817261?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/hands-on-math-graph-cubes/id553110021?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/presidents-vs.-aliens-lite/id427421823?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/presidents-vs.-aliens/id427418941?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/presidents-vs.-aliens-lite/id427421823?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/presidents-vs.-aliens/id427418941?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/skyview-explore-the-universe/id404990064?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/skyview-explore-the-universe/id404990064?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/skyview-free-explore-universe/id413936865?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/skyview-free-explore-universe/id413936865?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/nasa-app/id334325516?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/nasa-app/id334325516?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=gov.nasa
Free iPhone app: https://itunes.apple.com/us/app/star-chart/id345542655?mt=8&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/star-chart/id345542655?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.escapistgames.starchart
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.escapistgames.starchartgoogleeducation
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.escapistgames.starchart
Paid Android Tablet app: https://play.google.com/store/apps/details?id=com.escapistgames.starchartgoogleeducation
Paid Mac program: https://itunes.apple.com/us/app/star-chart/id1102412974?mt=12&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/star-chart/id714180827?mt=8&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/star-chart/id714180827?mt=8&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/puppet-pals-2-all-access/id557616416?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/puppet-pals-2-all-access/id557616416?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/puppet-pals-2-free/id589141096?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/puppet-pals-2-free/id589141096?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/mathtappers-clockmaster-math/id336932114?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/mathtappers-multiples-math/id371520443?mt=8&uo=4&at=10l6SU
Website: http://www.kodable.com/classrooms
Free iPad app: https://itunes.apple.com/us/app/kodable/id577673067?mt=8&uo=4&at=10l6SU
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.surfscore.kodable.main.android
Free iPad app: https://itunes.apple.com/us/app/word-warp-xtreme/id341808454?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/word-warp-xtreme/id341808454?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/starfall-abcs/id395623983?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/starfall-abcs/id395623983?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/abc-magnetic-alphabet-lite/id389132393?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/abc-magnetic-alphabet/id393762482?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/math-in-a-flash-free/id449206112?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/math-in-a-flash/id449193507?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/math-in-a-flash-free/id449206112?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/math-in-a-flash/id449193507?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/haiku-deck/id536328724?mt=8&uo=4&at=10l6SU
Website: http://www.haikudeck.com/
Paid iPad app: https://itunes.apple.com/us/app/word-wizard-talking-movable/id447312716?ls=1&mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/word-wizard-talking-movable/id447312716?ls=1&mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/mathtappers-find-sums-math/id353582286?mt=8&uo=4&at=10l6SU
Free iPad app: http://itunes.apple.com/us/app/toontastic/id404693282?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/toontastic-all-access/id563403725?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/easy-blog-jr/id716354615?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/easy-blog-jr/id716354615?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/math-doodles/id526959716?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/number-bonds-addition-subtraction/id602002204?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/10-frame-fill/id418083871?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/10-frame-fill/id418083871?mt=8&uo=4&at=10l6SU