Vocal Music It looks like it's going to be a rocking year for the music department as veteran teacher Mark Milner joins the Sheridan staff! Mr. Milner brings many years of teaching experience, along with several dozen student guitars, to our eager young musicians. Mr. Milner has already scheduled a winter concert for grades 3-6 and a spring gala for grades K-2. Welcome, Mr. Milner, and stay tuned for more information!