I include lesson files that I write as part of the lessons, and there is no extra charges for these files. The lesson files may include PDFs and wave files for the lessons. The files also include Guitar Pro files of these lessons if you feel you would like to purchase the program. I also include a MIDI file of the lesson so that if you use another software program you can possibly open the files with that.Every student is given a Dropbox folder so that I can upload files to them directly. I encourage students to use their personal dropbox folder to transfer lessons . If this is not possible, I can use a student's thumb drive. The samples provided below are partial lessons.