Make an appointment once a week and show her how to thread, clean, and have her practice sewing straight by following the lines of a notebook paper with no thread. Show her what tension is and parts of the machine. Have her do the things you show her while you are watching so if she has trouble you can tell her then. I would love to have someone with me when I sew as I always want someone to hold my hand as I know I am going to blow it.