I work in a music shop where I live and my most favorite musical instrument has got to be the mountain dulcimer. I created chord cards for people to learn how to use the dulcimer. And for those who want to learn music theory. Well I created a musical scale wheel just for you. Take that device to class with you and impress your friends who are struggling with their scales. Remember there are 84 of them and with this wheel in no time you will have the scales memorised.