Wordmover allows students to manipulate words on their ipad. It is a Read Write Think app created by the National Council of Teachers of English.
https://itunes.apple.com/us/app/word-mover/id572997152?mt=8
Read Write Think has some lesson plans on using this app.
http://www.readwritethink.org/search/?sort_order=relevance&q=using+word+mover+app&srchgo.x=-323&srchgo.y=-484&old_q=
