I think this might be an excellent way to get instant feedback about how well our students are going. It really fits in with the idea of success criteria and Powerful Learning.
Create "playlists" of web pages on a particular topic. Users navigate through the playlist in the order that you determine when you create it. Could be useful.
If you're like me and are hopeless at taking your own rolls, and you have an Android phone, you might like this. You can mark the roll on your phone each lesson, and at the end of the semester download the CSV file (it opens as a spreadsheet in Excel) and tally up the semester's absences.