Robin Castle



Robin grew up in the Great Lake State-Michigan.  She is named for the state bird which is considered a first sign of spring. She earned her M.A. in Education from St. Catherine University and a B.A in Education from Michigan State University.  

She has certifications for grades 1-6, with Montessori, English as a Second Language, and Exceptional Student Education. Her training and experience have afforded her insight and respect for the development of children, and the importance of the learning environment in their growth. 

Robin loves children, their nature as well as the nature of the world.  As a teacher, she has always sought to become more knowledgable with greater capacity to meet the needs of diverse learners.  The greatest joy in her career happened when she came upon the guide position with Acton. She has long yearned to be part of a community of learners that value the precious gifts within each child as the most important part of learning to learn, learning to do and learning to be.  She is energized daily to be working in an environment that has this level of appreciation for the magic of childhood which deeply resonates with her philosophy and views of child education and feels that the ideals articulated in River Oak's mission are coming into reality and action each time  trials and challenges are faced with integrity and courage.  Robin believes in celebrating family and always makes it back home every summer to her childhood home on the lake where she grew up.  She is blessed with three children and a sweet granddaughter who is already 7 years old! 

Tina Gibbs

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Guide /Atelierista 

Tina and her family moved in June 2018 from Newburgh, Indiana to St. Augustine in search for a new adventure. She graduated from Purdue University in Interior Design, but her quest had led her on many different pathways over the last decade.

After awakening to what really gives her joy (improving quality of life for others and bringing art back in her life), she started an art-based, whole-brain therapy practice in Indiana. Beautiful Minds, LLC worked with children and adults with various types and levels of brain disorders and injuries. She used a unique painting process to create changes in the brain and improve their quality of life. Six months after she moved to Florida, she and a friend founded Freedom Gardens, LLC to continue to help special children and adults. Tina embodies a deep passion to empower others to live their highest potential using her active listening and compassionate teaching skills with art and other modalities.


“I lead with my Heart and use Fear and Faith as my guide. I embrace uncertainty with Trust and Love, living with purpose toward my highest potential.”

Sara Chakkaphak

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Sara Chakkaphak grew up in a small town in Washington State. She graduated from Vanderbilt University with a Bachelor's degree in Communications and a Master's degree in Education with an emphasis in Organizational Leadership. After graduation, Ms.Chakkaphak began her career working at the Nashville Symphony, where she helped to plan and implement programs in the Education & Community Engagement Department. After two years of working at the Symphony, she transitioned to teaching and has taught various grades in the United States as well as internationally. In 2016, Ms.Chakkaphak relocated from Thailand to Florida with her son, Peter. She left her most recent teaching job to join River Oak, and is thrilled to be working with such a compassionate and forward-thinking team of educators. A steadfast proponent of the student-centered approach to learning, Sara believes, “Everyone wins when the children truly enjoy learning. I strive to ensure that River Oak provides every family with an experience rooted in real caring, collaboration, and courage to embark on their hero’s journey.” In her spare time, Sara enjoys reading, cooking, and traveling with her son.