Evernote is a free productivity app that allows you to compile all of your notes in one place and export them in a pdf format. Its simple interface also allows for students to work distraction free. This app also allows for collaboration amoung students through shared evernote binders. Evernote also allows for list making and other basic organization tasks.
How it works:
Students create a free evernote account and can take notes directly on their iPad or Tablet. This is expecially good to use in a classroom, because accounts can be linked and documents can be shared between students. This would work well for when a student is absent from school. The app includes word documents and spreadsheets.