Grand Rapids School of Music Instructors




Liem Nguyen


Liem Nguyen is a graduate of Godwin Heights High School and holds a bachelor’s degree in trumpet performance from Western Michigan University and a master’s degree from the University of North Texas. Nguyen has performed in various ensembles and has taught students at all levels of experience. Currently, he is the brass instructor for Godwin Heights Bands.

David Schultz

Trumpet, French Horn, & Low Brass

David Schultz is a performer, composer, and music educator in Grand Rapids, Michigan. He has studied music education, performance, and composition at Western Michigan University and received a Master of Music degree in performance from the Hartt School in West Hartford, Connecticut. Schultz’s students have earned first chair positions and membership into honors and All-State ensembles. Schultz is an active clinician who works with schools in the area, and he also composes film scores, video game soundtracks, and chamber music.

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Nan DeCook


Nan DeCook has been a music lover from an early age and brings many years of teaching experience to Marshall’s School of Music. She has degrees from Cornerstone University, Calvin College, and Western Michigan University. She has taught in both classroom and private studio situations and is equally comfortable teaching both flute and piano. She has studied with Henry Osborn, Deb Good, and Darlene Dugan. In addition to her music background, she also has training in teaching children with visual impairments and is open to the use of Braille music and rote learning. She truly enjoys teaching students and seeks to inspire her students to grow beyond their expectations.

Mike Petkus

Clarinet & Saxophone

Mike Petkus holds B.M. and M.A. degrees from Western Michigan University. Petkus is retired from the Grand Rapids Public School district, where he was a band director for 28 years. He currently performs with the Kalamazoo Concert Band as concertmaster. Petkus is also the E-flat and principal clarinet of the Kalamazoo Philharmonic Orchestra. He performs with Arcadia Woodwind Quintet and Ensemble des Amis, a chamber group in the Kalamazoo area consisting of clarinet, piano, and strings. Petkus is retired from the Battle Creek Symphony as clarinetist and E-flat clarinetist. He has taught privately in the Grand Rapids area for 25 years and has been with Marshall Music since 1997.

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Orchestral Strings


Lucille Spinner

Violin & Viola

Lucille Spinner, Suzuki-certified Violin and Viola teacher, received her Bachelor’s Degree in Education and her Master’s in Music Education at Wayne State University. Lucille has studied with Emily Austin of the Detroit Symphony Orchestra and has studied in the Suzuki Program. Attaining Suzuki certification, Lucille went on to teach in the Suzuki Program at Grand Rapids Community College.


A former member of the West Shore Symphony, Lucille started the Newaygo Community Orchestra and served as the group’s conductor for 2 years. She has been focused on education throughout her career and continues teaching in studios in Hudsonville and Fremont. She is a member of the American String Teachers Association, the Suzuki Association of the Americas, and the Sigma Alpha Iota music fraternity. Lucille brings a lot of experience and specialized training to her studio at Marshall Music.