For technology to be meaningful/effective, as with any other teaching tool, the application needs to align with the objective being taught
Making students accountable for stations/centers encourages ownership for learning and responsibility for devices.
I liked Thinkfinity in combination with Essay Map for stations in which students move from understanding to critical thinking and creating a product from information studied. Accountability includes multiple choice, written short answer questions, and essay responses
Apps in iPod Touch/Pad that lend themselves to stations include Daily History, On This Day, and Simple Mind x-Mindmapping. This can be used to create compare/contrast activities w/ brainstorming as a final product for later class discussion.
Really liked the idea of Awesome Note Lite for use with co-teach students in getting notes for test preparation. Tools also has the ability to modify interactive websites for special ed populations.