Our Faculty

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Mike Caslin

Precalculus and Geometry

Mike brings a wide range of experiences to his Mathematics instruction. He has a B.S. in Industrial Engineering from Virginia Tech and an M.S. in Systems Management from Colorado Tech. He embarked on a 20+ year career in telecommunications and defense contracting before switching careers to the wonderful world of education. Since 2006, Mike has taught high school Math in Loudoun County as a full-time classroom teacher, a homebound/home-based instructor, and as private math tutor. He currently has an active post-graduate professional teaching license in the State of Virginia with an endorsement in Mathematics.

Eileen Hughes

Spanish 1 and American History

Eileen is native of the DC area and a graduate of the University of Maryland at College Park.  She holds a degree in Secondary Education and Spanish.  As an undergraduate student Eileen studied in Madrid, Spain and served as a volunteer English teacher for university teaching assistants.  Post graduation, Eileen began her teaching career in the Maryland Public schools.  During that time she participated in a teacher exchange program with a school in Toluca, Mexico and served on panel of educators writing new curriculum and assessment materials at the secondary level.  As her family grew, Eileen worked from home tutoring and teaching small group classes for students of all ages.  Outside of the classroom Eileen enjoys outdoor adventures of all kinds with her husband and children.  She and her family are parishioners at St. Theresa in Ashburn. 

Susan Lindner

Biology and Chemistry

A mother of five, Mrs. Lindner has homeschooled since 1993. She has taught high school and middle school Chemistry and Biology to the homeschool community since 2006. She is a graduate of Georgetown University, and a member of St. Mark Church in Vienna.  

Jill Matz

Literary Studies, World Literature and British Literature

Mrs. Matz graduated summa cum laude from the University of New Hampshire in 1981 with a BA in English Literature. She went on to teach two semesters of Freshman composition and complete six courses toward the MA in English. At UNH she met her husband Steve, a recent convert to Catholicism, who introduced her to the truth and beauty of the Faith. She homeschooled her seven children for more than fifteen years, using Mother of Divine Grace for most subjects. The Matzes have lived in Virginia since 2004 and have been active members at St. Mary Mother of God Catholic Church in DC since then.

Sabine Möller

Apologetics and Dramatic Arts

Sabine Möller is a life-long Catholic and a founding parishioner of Our Lady of Hope Catholic Church. She grew up in Germany, learned English at a young age and eventually moved to the United States. Sabine attended Franciscan University of Steubenville where she obtained a BA in Theology/Mental Health & Human Services, AA in Education, Minor in Human Life Studies, and a Minor in Sacred Music.  Sabine has a Virginia Catholic Education Association License and a Master Catechist Certificate.  

Teaching comes naturally for Sabine.  She has taught grades 5 through 12 including Biomedical Ethics, Scriptures, Intro to Catholicism, Church History, Apologetics, Morality, Sacraments and Pre-Algebra.  She has done most of her teaching in Virginia, but also spent time teaching in a college prep school in Managua, Nicaragua, where conditions led her to adopt an inventive teaching style.  Sabine has also spent time tutoring and teaching CCD at various parishes. She has spoken publicly on the issues of chastity and pro-life issues, and ministered in crisis pregnancy centers.  Sabine has used her degrees in various ways:  youth minister (Maryland), retreat leader (Germany), missionary (pro-life, Exodus Youth Services – for the poor in DC), counselor (Johns Hopkins Camp Sunrise & SunSibs – pediatric oncology patients and their siblings). 

Sabine is a cantor and choir member at Our Lady of Hope Catholic Church.  She enjoys German candle making, an intricate craft into which she incorporates her Faith.  Sabine has also been involved with the world of drama, where she has assumed all roles, from onstage to producer to director.  She loves to travel, especially on pilgrimages to holy sites around the world and to visit her family in Germany. She lives with her best friend, along with two dogs, two cats and 2 birds. Sabine is looking forward to sharing her joyful love of the Faith and of life with the students at St. John Bosco School.

Sandra Mumford

Pre-Algebra, Algebra 1 and Algebra 2

Bridget O’Donnell

Middle School Religion

Miss Bridget O’Donnell or “Miss B” as she prefers is a graduate from Christendom College. She started out teaching at a Montessori school and has taught religion at St. Thomas À Becket parish for over six years. After leaving Montessori, Miss B worked as a governess for a political family. As a governess she took on responsibilities of private tutor, caregiver and personal assistant. Miss B is very much looking forward to becoming part of the St. John Bosco School community as the 7th/8th grade religion teacher. 

Kelly Sonnhalter

Earth Science  and Physics

Kelly Sonnhalter is a home schooling mom, who has a passion for all things SCIENCE! Kelly has been home schooling her  children, for the past five years and believes that learning is most vibrant when it is hands on. Her passion for science began in college; where she earned a Bachelors Degree in Integrated Science and Technology from James Madison University, and then went on to earn a Masters Degree in Biotechnology from Johns Hopkins University. After finishing college, Kelly worked as a research associate for the pharmaceutical and oil and gas industries. Kelly uses her academic and professional experience to bring real life applications into her science curriculum. Kelly lives in Ashburn, Virginia with her husband Kevin and their three children, Jacob, Jenna and Heidi. Kelly and her family are parishoners of Saint Joseph Catholic Church in Herndon, Virginia. 

Irene Starrs

Mrs. Starrs has a B.S. in Mathematics and Religion from The College of William and Mary, and an M.A. in Theology from Franciscan University of Steubenville. She and her husband are the parents of six daughters, all of whom have been homeschooled over the past 21 years.  She has taught middle school and high school homeschool courses on various topics for the past 8 years. Courses include Classic Literature and Shakespeare, Public Speaking, Debate, Personal Finance, SAT and ACT Prep, and Geometry. She also has many years of experience as a private tutor in math and SAT prep. In her pre-homeschooling life, Mrs. Starrs taught Religion and Technical Drawing for two years at Bishop O’Connell High School in Arlington and served as the Director of Religious Education and Youth Minister at St. Thomas a Becket Catholic Church in Reston for eight years. This past year she returned to youth ministry on a part-time basis and currently serves as the Coordinator of Youth Ministry for Christ the Redeemer Catholic Church.

Isabella Tyson

Spanish 2-3 and Spanish Conversations and Cultures

Isabella is a native of Bogotá, Colombia, and arrived in the United States in 1996 after marrying her husband Ted. She received her Law Degree from the Universidad de la Sabana in Bogotá, and a Master of Law in Comparative Law from the University of Miami. She has four children and has been homeschooling for thirteen years. For the past six years she has been teaching at a homeshool co-op in Chantilly and offering small group Spanish classes. She is a member of St. Timothy Catholic Church and has been involved with their CCD, VBS, and youth programs for many years. Isabella is looking forward to sharing her Hispanic heritage with Saint John Bosco School!

Kathryn Weber

A Classical Approach to Writing and Rhetoric 

Kathryn Weber is a wife and mother of five who earned a BA in Elementary Education (grades K-8) from Virginia Tech University, and who is now pursuing a Master of Humanities with a Classical Education Concentration degree at the University of Dallas. She has taught in Norfolk Public Schools, Chesapeake Public Schools, and at Saint Leo Catholic School in Fairfax. She later home educated her own children for 21 years. Kathryn is a firm believer that the amount of excellent literature which is soaked up by a student leads directly to that student’s ability to write and speak well. Excellent literature is that which embodies and leads to the contemplation of the Good, the Beautiful and the True.