Mr. Mahowald earned his Bachelor of Arts in music and biochemistry from Augustana University in 2016, and his Master of Education in Teaching from the University of Sioux Falls in 2018. His primary instrument is percussion, and he has enjoyed many opportunities to perform in the Sioux Falls area including with the South Dakota Symphony Orchestra, the Sioux Falls Municipal Band, and more.

His passion for music is what drives his educational philosophy, and he hopes that his students learn to love and appreciate music as much as he does.

Outside of music, Mr. Mahowald enjoys board games, YouTube documentaries, and relaxing at home with his wife and fellow music teacher, Becca, newborn son, Leland, and three cats.

Mrs. Decker graduated from the University of South Dakota in 2014 with a bachelor’s degree in music education. While in college, she was a member of The Sound of USD marching band as drum major, participated in the symphonic band, concert band, woodwind ensemble, concert choir, jazz band and pep band. Mrs. Decker is currently an active member of NAfME and the South Dakota Bandmasters Association and is also an alumna of the international music fraternity Phi Theta Upsilon. She was also selected to be part of the 2019 class of USD’s 30 under 30. This is her second year at Roosevelt and eighth year teaching overall. Currently, Mrs. Decker resides in Sioux Falls with her husband, Jordan, and two boys, Grayson and Reddik.

Teaching is my vocation, and theater is my passion. I cannot wait to work with all of the amazing students who come through Roosevelt!

I have my BA in Theater and Communication. I have my Masters in Education and my Master of Arts in Theater. I’ve worked and taught with several theater companies, SDSU, and USF.

My family and I moved from Brookings, SD and we are excited to now call Sioux Falls home. I have two kids, Killian and Aria. As a family, we love playing board games, playing outside, and participating in all fine-arts activities.

I’m here for the students. They take top priority in my class. Through mutual respect and kindness, we can build a positive classroom and embed learning through multi-model means.

Mr. Costanzo has been a Visual Arts teacher at Roosevelt High School since 2009. He earned an undergraduate degree in Art Education and Painting and Printmaking from South Dakota State University. Later, he went on to study classical academic painting full-time for three years at The Grand Central Atelier in New York City.

Mr. Costanzo emphasizes traditional drawing and painting techniques in a scaffolded teaching approach for his High School students from Freshman up to Seniors. Passing on a life-long appreciation for truth and beauty in the visual arts is

Mr. Costanzo's biggest motivation for continuing to work with young people each day.