Why choose Cornerstone Achievement Center?


Grace Cook


Grace Cook is a graduate of Kutztown University with a B.A. in Sociology. She earned her Master’s of Special Education degree from University of North Texas with an emphasis in Autism Intervention. She has a variety of experiences ranging from residential settings, home settings and school settings. Grace has provided special education services to children ages 2-18. Her experiences include working as an Early Intervention Specialist, Special Education Preschool Teacher, Program Manager, and Behavior Therapist. She has experience creating and implementing behavior programs using the principles of applied behavior analysis (ABA) and creating and implementing curriculum to foster group and individual goals in the areas of communication, social skills, skills of daily living, motor skills (fine and gross motor) and academic skills. She has a passion helping each child reach his or her full potential. She lives in Wylie with her husband, two sons, and daughter.


Katelyn Barbier-Mueller


Katelyn Barbier-Mueller is originally from Mobile, Alabama, where she studied Rehabilitation and Disabilities Studies at Auburn University. After graduating she moved to Dallas to intern for the ministry Joni and Friends, which supports special needs ministries in churches and day programs throughout the Metroplex. After her internship at Joni and Friends, Katelyn worked as the Instructional Specialist at Connecting Point of Park Cities, a day program providing meaningful days for adults with special needs. Katelyn is newly married and enjoys spending time with her family and friends. She loves to travel and is very passionate about her faith.


Abbi Fletcher


Abbi is excited to start new a chapter of her life and career in Dallas. She moved here from Wichita, Kansas where she worked with special needs students at Stucky Middle School. During her time there Abbi was recognized by the district for her work creating a curriculum designed to build students independence and prepare them to enter the workforce. Abbi loves art, dance and all things creative. As a teacher at Cornerstone she uses the arts to engage students and to help them unlock their ability to communicate and express themselves. Faith is at the center of Abbi’s life and her work. Through hard work, prayer and persistence she believes anything can be accomplished. She brings that belief to her work with her students. When she’s not working you can find Abbi hiking around North Texas or trying new restaurants with friends.