With 21 years of teaching experience under his belt, Dave Stordalen joined the music program in Fergus Falls as a general music and orchestra teacher, bringing a wide range of experience along with him. âMr. Stordalen joined the Fergus Falls Public School on Jan. 4 â and we are thrilled to be able to add his talents to our music department. He comes to us with an extensive background in teaching instrumental music both in band and in orchestra. He taught for many years in southern Minnesota, and most recently served as a music director at Bemidji State University,â shared Kennedy Secondary School Principal Dean Monke.