Book, paper agenda, organizer or notebook are unfortunately very much used for lecture preparation. For every lecture, teachers write a lot of data. But, more important is the content. Teachers note down all the activities, from the first to the last minute of the lecture as well as the files he/she needs. Some files are folders, some on CD-ROMs, and some are downloaded. However, teachers need to enter not only file names, but also descriptions of contents which will be explained to students. Do you really need paper instructions?