Meet Our Staff

Sarah Peterson

Sarah is the Director at Valley Preschool. She comes to Valley with a diverse background including teacher, published researcher, educational developer, business owner, consultant, and Mom. She holds two degrees: a B.M.E. & an M.S.E. from the University of Wisconsin – River Falls and is a professional member of several national organizations including the academic honor society Phi Kappa Phi. Sarah is active in the community and serves on several educational Boards. She resides in West Lakeland where, in her free time, she enjoys spending time outdoors year-round with her husband Matt and their two young daughters, Alaina and Abby.

Desiree Slagle

Ms. Desiree came to Valley with a varied teaching background which includes working in early childhood, teaching kindergarten and most recently working with students with special needs in the autism program in the Stillwater school district.

Desiree enjoys working with young children and brings high energy and a hearty laugh to the classes she shares alongside Ms. Paty and in the WThF PM class with Miss Mary.

She enjoys spending time with her family and friends and is a huge sports fan (the MN Vikings are her favorite). Ms. Desiree lives in Stillwater with her husband and two elementary-aged children, Allison and Ben.

Patricia Osorio Rawlings

Tia (which means "Auntie" in Spanish) Paty is a well-known and loved teacher here at Valley. She co-teaches alongside Ms. Desiree, as well as leads the Pre-K Spanish Immersion program.

Paty is originally from Chile, and began her teaching career nearly a decade ago. She most recently moved with her family from Hawaii where she worked and taught younger students.

She loves to create fun, hands-on games and activities for her preschool-aged children. She incorporates lots of music and movement throughout her classes and the children enjoy her upbeat personality! 

In her free time, Tia Paty enjoys spending time with her husband, children, nieces, and nephews. She also designs and sells her personal creations/works on the website, Teachers Pay Teachers. Her favorite past-time hobby is scrap-booking.

Mary Sullivan

Valley Preschool welcomed to our staff this year Mary Sullivan. Mary enjoys working in a school setting and spending time with preschool-aged children. 

Mary serves as an aid to Ms. Desiree in the WThF PM class. 

When not working, Mary enjoys spending time with her friends and family.


(651) 439-8850

413 Greeley St S, Stillwater, MN 55082, USA

©2016 by Valley Preschool. Proudly created with