Welcome to Adelphia


Christian Bettenhausen

Financial Manager

Mr. Bettenhausen is the Assistant City Attorney for the City of Westminster (last 14 years), and also serves as City Attorney for 2 other cities. Mr. Bettenhausen specializes in the representation of municipalities, in business formation, non-profit organizations, and in zoning & land use matters. Most recently he served as Vice President of Veritas Classical Academy. For many years he has served, and continues to serve, as the Overseas Missions Coordinator for Coast Community Church. He runs the church’s Malawi Mission project. Currently at Adelphia, Mr. Bettenhausen oversees all financial aspects of Adelphia as well as
serves as chapel coordinator.

Diane Bartosch


Principal Bartosch has a backround as Software Engineer who worked in that field from 1982 to 1993, coding a diverse range of software from video games to manufacturing software to frequency of vibration detection to web communication to electron scanning microscopes. After the birth of her second child she became a stay-at-home, homeschool mom while owning and operating a software recovery company. During that time also, she trained to become a Biblical Family Counselor. She has successfully homeschooled her 4 daughters from Kindergardten through high school graduation - a period spanning over 21 years. For many years Principal Bartosch served as the Administrator of Aslan Academy. She also has taught 7th – 12th grades at Home School Family Ministries and Aslan Academy, as well as classical studies at Veritas Classical Academy. Currently at Adelphia, Principal Bartosch serves as the school Principal as well as teaches electives.

Tessy Tzoytzoyrakos

Vice Principal

Mrs. Tzoytzoyrakos currently serves as Master Lecturer at the University of Southern California (USC) Dornsife School of Letters, Arts, and Sciences. She is also an Adjunct Assistant Professor with Rossier School of Education teaching in the award-winning online MAT-TESOL program. Ms. Tzoytzoyrakos has many years of experience in the field of education, teacher training, and school administration. She recently served on the Board of Directors at Veritas Classical Academy as Secretary. Anastassia has been homeschooling for over 15 years, having already graduated her two oldest sons. Currently at Adelphia, Annastassia serves as the Vice Principal as well as coordinates all parent participation. She has also taught Fine Art Theater and Music.

Tiffany Bettenhausen

Asst. Vice Principal

Mrs. Bettenhausen was a teacher at Veritas Classical Academy, and also at Classical Conversations in Orange and Long Beach prior to that. She and Christian have 8 children and have been homeschooling for the last 15 years. For a number of years she also served as the Homeschool Administrator for entire Southern California Region (214 families) for the Advanced Training Institute of America (ATIA). Currently at Adelphia, Tiffany serves Asst. Vice Principal as well as the liaison for parents and prospective parents.