There are many times when a tablet would be used ina class and shared .. Recording experimental results, presenting to the class. It would be useful to be able to have the next step in a discussion or activity hidden until needed for example. Tests were just an example of something to keep hidden. In modern classrooms with tech savvy teachers are using shared tablets all the time! So I am not just talking about my iPad, but all the trolley full if iPads and other tablets that are used in modern classrooms. One student for example may input their answers to a task and then pass the tablet on to another. Theses notes could be more useful if easily hidden by a password. If EverNote can't geta password organised, then OneNote is what will be used in schools. With OneNote, notes can be password protected easily..