Cornerstone Academy, Westerville, OH Cornerstone Academy PTO http://t.co/7ggkxgtQtJ cornerstoneacademypto@gmail.com We're a K-12 public charter school, offering educational excellence accessible to all students The Cornerstone Academy PTO exists to enhance and support the educational experience at Cornerstone Academy, to develop a closer connection between school and home by encouraging parental involvement, and to improve the environment at Cornerstone Academy through volunteer and financial support.