I think your materials are excellent. Some of the workbooks would not print properly and I found that frustrating, similarly in some books the button to play a video or sound is too close to the corner of the page and hence, the page kept turning and no video/ sound. Your technicians made suggestions but most of the time they did not work. Sometimes Sarahi worked better than Google Chrome. Very annoying when all I want to do is study not try to get stuff to work. I don't want to stop but cannot afford the lessons any longer.