Administrative Staff
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Bill Gibbons

ALL His Kids Executive Director

Bill Gibbons is an educator, author, businessman, and entrepreneur who  has  dedicated  his  life  to  serving  Jesus  Christ.    He  began  his  career as an elementary teacher, then transitioned to a junior and senior high reading specialist and administrator. During his eleven years  in  public  education,  he  was  twice  designated  in  different  districts as young educator of the year. He wrote a book published by Random House on how to increase student performance while lowering instructional costs. He left public education to form a non-­‐profit, research-­‐based company to examine and create effective practices  to  increase  student  achievement.    As  a  result  of  his  research, he founded HOSTS Learning, a for-­‐profit corporation, and served as CEO and chair of the board for 29 years. The company was created to provide proven, research-­‐based solutions to school districts  across  the  nation.    Under  Mr.  Gibbons’  leadership  and  the  Holy  Spirit’s  direction,  HOSTS  Learning grew to become the third largest provider of supplemental services to public schools in the nation. HOSTS Learning served over a million students in 44 states and Central America, and was accorded  the  “Blue  Chip”  award  by  the  National  Chamber  of  Commerce  as  one  of  the  top  entrepreneurial companies in America. Mr. Gibbons worked with national leaders in education, business,  research,  and  politics.    He  was  blessed  to  work  with  two  US  presidents,  congressional  leaders, and governors to create high-­‐performing, low-­‐cost practices that advanced learning in low-­‐achieving students. HOSTS was the only practice identified in the landmark legislation, “No Child Left Behind”, as a national model. After retiring from HOSTS Learning in 2008, Mr. Gibbons was appointed superintendent of Portland Christian Schools in Portland, OR. In 2011, he accepted the position of superintendent of Cornerstone Christian Academy for Learning & Leadership (CCALL) in Vancouver, WA, where he served for eight years. CCALL has become one of the most technologically advanced Christian schools in America. The school has grown at an average rate of 13% a year, and under Bill’s leadership, Cornerstone relocated to a new campus in 2018. Mr. Gibbons stepped down as Superintendent of CCALL in July 2019 to become Chairman of the Board of Trustees at CCALL and Executive Director of ALL His Kids (AHK), a nonprofit organization dedicated to Advancing the Kingdom of God by funding and replicating CCALL around the nation and world. He is helping to plan, fund, and launch an Early Childhood and K-­‐12 school modeled on biblical principles and around Stanford University’s “Schools of the Future”. The theme of the school will be “In Search of Truth”. The emphasis will be placed on modeling instructional practices around students’ spiritual gifts and academic passions.

Sandra Yager


Sandra Yager, a native of Argentina, is a dynamic educator who has followed Jesus Christ throughout her life and declares Him her Lord and Savior. She received her degree as Professor of Mathematics from CONSUDEC in Argentina and moved to the United States at the young age of twenty-two, after marrying Mr. Yager, a Vancouver native. They are the parents of two lovely young women.

Sandra began her career in the United States in banking. After four years, she pursued her passion to teach, and accepted a position at Jason Lee Middle School in Vancouver as a math teacher, then moved over to open Skyview High School as an assistant principal. Later, Sandra was appointed principal of the Vancouver School of Arts and Academics (VSAA).

In 2000, she had the opportunity to move to the Hockinson School District, where she helped the community transform Hockinson into a K-12 school district through the opening of their high school. She devoted her heart to creating a high school built on the foundations of rigor, relevance, and relationships. Hockinson High School opened in 2003 and graduated its first senior class in 2006. That project will forever mark Mrs. Yager as a respected leader and team player by her staff and community. In 2010, she moved to the Longview School District and became the principal of Monticello Middle School, a state-designated “low performing school”, where she helped create a culture committed to improving student performance – academically, emotionally, and relationally. There was only one job which could persuade her to leave, and that job moved her back to Clark County in 2011, when she assumed the role of Superintendent of the Hockinson School District.

After twenty-five years in public education, God called Sandra to be a part of Christian education, where she can openly share her passions – her love for Jesus Christ, family, and education. She will continue the vision of Cornerstone Christian Academy for Learning & Leadership by preparing Christian servant leaders who can excel in the world and rise to positions of significant influence to advance the kingdom of God. Sandra was recently appointed as a non-voting board member to work with the CCA board, along with community and national leaders, to help design, roll out, and reproduce cost-effective, scalable Christian schools of excellence that can be replicated nationally and internationally.

Mike Hoff


Degrees and Certifications: B.A. – Liberal Studies, Education; M.S. – Educational Leadership Faith Based

Mr. Mike Hoff, the elementary principal, joined the Cornerstone Christian Academy administrative team in June, 2014. He moved his family from the Bozeman, Montana, area to Battle Ground to take on this important position. Mr. Hoff began his education career in Glendora, California, in 1996 as a second grade teacher, and eventually became a principal and administrator of a K-12 non-denominational Christian school in Ogden, Utah. In addition to teaching second grade, he has taught fourth and sixth grades, middle school science and Bible in the Christian and public school settings. Mike has also served on School Site Councils and curriculum adoption study teams, served as a grade level mentor teacher, been the community liaison for Christian Heritage School and worn many other hats over the years. Mr. Hoff and his wife, Leah, have seven kids and several grandkids that keep them busy when he is not at school. Mike was saved by Jesus Christ at the age of twenty-four and has since served as a youth leader, a missionary in East Africa, Mexico, and Honduras, in addition to being a Christian educator. Mr. Hoff looks forward to how Cornerstone will grow in the years to come and what impact its students will have on the community and world in the future.

Sarah Thulin

Executive Secretary

Degrees and Certifications: B.A. – Elementary Education (Wheaton College)

Sarah has experienced Cornerstone from just about every angle – as a student, a teacher, a parent, and now, as the elementary administrative assistant. She is married to Chris, and they have three children who have attended Cornerstone – Josiah, (Class of ’15), Emma (Class of ’16), and Abby (Class of ’18). When she’s not at work, she enjoys reading, spending time with friends and family, traveling, and cheering her children on at their various sports and activities. She loves the Cornerstone family and its mission, and feels privileged to be a part of what the Lord is doing here at CCA.


Rondy Thurlow

International Student Program Director

Rondy has been involved with Christian Education for the last 20 years. She grew up in Yacolt, WA and knew from a young age that God had called her to minister to children. She has enjoyed teaching preschool, tutoring students and her administrative assistant duties at the middle school. For the last four years, Rondy has worked with our International Student Program as the host family coordinator and in 2017 took over the position as the program director. She is excited that the program is growing at Cornerstone. “The International Student Program has become such a vital part of Cornerstones growth both culturally, physically, and most of all, spiritually and I’m blessed to be a part of it!” Rondy would love to talk with you about the program or the blessing of hosting an international student full or part time. Feel free to call or email her for more information.


Robert Mason

Athletic Director

Mr. Mason spends much of his time coaching Cornerstone students! He has coached our cross country team for 6 years, track for 7 years, and volleyball for 2 years. He would be the first to admit that his first love is coaching basketball where he has spent 27 years coaching first grade through high school. Mr. Mason is growing our athletic program each year! Mr. Mason has been our Athletic Director since 2006. He has been married for 17 years and has 4 children (the youngest attending Cornerstone!) He is also a recent grandpa. Mr. Mason studied business management at Clark College and has spent over 20 years in the field of business management. When you don’t see him at Cornerstone, you will probably see him driving some of his souped up vehicles he loves to collect!


Darius Movafagian

Technology Instructor / Director of IT

Degrees and Certifications: Degrees and Certifications: B.A.- Art/Multimedia (CAL State Hayward); M.A. – Teaching City University

Degrees and Certifications: B.A.- Art/Multimedia (CAL State Hayward); M.A. – Teaching City University

Mr. Mo has been with Cornerstone since 2003 teaching at all grade levels. He enjoys using his experience and expertise in technology, to engage students and make learning fun. His favorite thing about teaching is helping students find their voice, gifts and the path that God has for them.

Brian Millett

IT Manager

Brian has a background in computers, psychology, and music. He has served in various capacities as a worship leader and IT worker for the past 20 years. He joined Cornerstone in 2014 to help manage the network infrastructure and other computer-related things. He has one son attending Cornerstone, and two other grown children who make him very proud. He is an active member at Liberty Bible Church, and enjoys vacationing anywhere there is water – preferably not falling from the sky.

Kaylynn Mumley

Tracy Stevens

Director of Communications

Tracy Stevens completed her bachelor’s degree with honors in three years from the University of Oregon majoring in Journalism and Communications with an emphasis in Public Relations. After graduation, Tracy moved down to Los Angeles, where she began working in production. Her first job was working at Paramount Studios for “The Leeza Show.” She then began working as a Talent Coordinator at “The Tonight Show with Jay Leno.” Tracy booked the civilian guests for the show and was in charge of coordinating all the details for each guest’s appearance.
Tracy joined the CCA team in 2012 as Director of Communications. She oversees the creation and execution of all communications and marketing for CCA. She is passionate about bringing God back to education and equipping children to be the next generation of Christian leaders. Tracy lives in Vancouver, Washington with her husband, Armand, and their three children.

Natasha Allen


Natasha moved to Vancouver in 2015 after spending 8 years on the Oregon Coast. Cornerstone came onto her radar as she searched for a school in the Vancouver area that would best support her kids needs. After 2 years of being a parent, connecting, and volunteering, she loved the school’s mission so much that she became part of the Cornerstone team. With a BA in business and accounting and a determination to take on any task large or small, she is a great asset to our team. When she’s not at work, Natasha loves working out, obstacle/mud runs, spending time with family and friends, and reading. She feels honored and excited to have the privilege of working and growing with the CCA team!

Dawn Koenninger


Dawn Koenninger is a financial and quantitative analysis expert who by measuring what matters and through bottom-up financial modeling has help to build start-up companies into multi-million dollar enterprises.

After spending 27 years working with small companies to raise venture capital and leverage investments to achieve aggressive growth target Dawn knows how to gather and apply information with rigor and imagination to create exponential increases in productivity and profit.

Dawn launched her career working as a CPA for a Big Four accounting firm and hold a BS in Accounting from Portland State University.

Karina Litvinov


Karina has been with Cornerstone since 2017. After homeschooling her girls for 6 years, a friend shared about their wonderful experience with CCA and God provided an opportunity for Karina’s family to join. Originally Karina is from Latvia but has been stateside for 25 years. She has worked in many roles at CCA from recess, teacher’s aide, and now working in our accounting office. When she is not taking her three girls to piano, violin, or gymnastic lessons, she enjoys spending her time outdoors, writing in calligraphy, playing violin and traveling with her husband. She is also fluent in Russian and enjoys teacher her girls the gift of a second language. Karina feels blessed for the opportunity she has been given to be part of the CCA family.


We promise to provide a safe, nurturing, Christ-centered environment with highly qualified, born-again instructors who will stimulate and inspire the spiritual, academic, and physical development of all our children.

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