Administrative Staff

Administrative Staff

Heather Gray
Head of School

Heather Gray has twenty- six years of experience as an educator and administrator. She has taught across all levels from toddlers to adult learners. Prior to joining the administrative team at Walnut Farm Montessori School she was Head of School at Firelands Montessori Academy in Huron, Ohio. She holds a Montessori Primary Credential from the Adrian Dominican Montessori Teacher Education Institute, a Montessori Administrative Credential from the Seton Montessori Institute and a Masters Degree in Child Development and Education from Mills College. She has audited portions of Montessori Secondary Training from the Cincinnati Montessori Teacher Education Institute and is currently auditing Montessori Elementary Training through Montessori Elementary Teacher Training Collaborative. Heather and her husband John live in Fayetteville with their two daughters.

Karel Hayre

Karel Hayre has been with Walnut Farm since 1997. Her well rounded experience in the Montessori environment has led her to be an expert in her current position as Administrator. Prior to serving as the administrator, Karel assisted in a primary classroom for 2 years and an elementary classroom for four years. It has been a delight for her to be part of the WFMS community for 22 years.


Leslie Johnson
Financial Officer/Administrative Assistant

Leslie Johnson, a native of Oklahoma, graduated from the University of Central Oklahoma with a bachelor’s degree in accounting. Leslie began volunteering in a Tulsa Montessori school when her children started their Montessori education. She eventually became a full time employee, subbing in the classrooms and working in the administration office. Leslie is excited to offer her accounting expertise and love for Montessori education to the WFMS staff and community. Leslie and her husband, Todd relocated to Arkansas for his work in 2013. Together they have four amazing children.

Heather Incao | Administrative Staff  

Heather Incao
Curriculum Specialist

Heather Incao has been involved with Walnut Farm since 1998 where she began as an assistant. The following year she received her Montessori primary credentials and served as a lead teacher from 1999-2004. Heather then took a short break to care for her son, Christopher, born in 2004. She returned in 2008 as a substitute teacher and in 2010 began again serving as a primary lead teacher. In 2014, Heather assisted in the lower elementary classroom and in 2015 she returned to primary as a mentoring teacher. Heather has served as the Curriculum Specialist for the school since 2016. Heather lives with her husband, David, and family on Beaver Lake where she enjoys water skiing, paddle boarding and kayaking. Heather has three children: Rachel, Jane, and Christopher-all Walnut Farm alumni.