At Naperville Christian Academy, we know how important it is that our students sit under godly women and men, Christians who are equipped to lead and teach children what it looks like to live a life following Christ. We constantly receive applications from amazing candidates who would love the opportunity to teach at NCA and are blessed to have such a qualified group of men and women teaching here.


Grammar School Faculty

Sumi Arun is our Pre-Grammar School teacher and teaches our afternoon session of the full day Kindergarten program. Sumi completed her Montessori training from the MECA Seton Montessori Insitute in 1992 and is AMS certified. She has over twenty years of teaching experience in area Montessori schools working with children ranging in age from 2 to 6 years old, including Kindergarten and Enrichment Programs. Prior to joining Naperville Christian Academy, Sumi began to integrate classical methods into her Montessori class as she prepared Kindergarten students for First Grade at Naperville Christian Academy. Sumi Arun lives with her daughter and three grandchildren in Naperville. She attends the Compass Church where she is active in the Adult Bible Study Ministry.

Jill Duvall is our Kindergarten teacher. Mrs. Duvall earned her BS from Wheaton College and her MAT from National Louis University. She has worked as a substitute at NCA and at local schools for last two decades. She has also been the area coordinator and an active volunteer at Christian Youth Theatre (now Spotlight) and has taught and worked with the youth at Wheaton Bible Church and Harvest Bible Chapel. Mrs. Duvall is the mother of 2 daughters, one of whom also teaches at a classical school. Mrs. Duvall Joined the staff of NCA in 2013.

Danielle Walker teaches the 1st grade class and joined the NCA faculty in 2012. Ms. Walker earned her bachelor’s in elementary education from Moody Bible Institute and her master’s in teaching from Trinity International University.
Courtney Bahr teaches the 2nd grade class and joined the NCA faculty in 2014.  Mrs. Bahr graduated from University of Illinois with a Bachelor’s Degree in Early Childhood Education and a minor in Language Arts.  She taught Kindergarten for the last two years in Paxton, IL before moving to the area after her recent marriage to Brad Bahr.

Lisa Wiersema teaches our 3rd grade class.  Mrs. Wiersema has a Bachelor’s Degree in English Literature and Christian Education from Wheaton College.  She classically home schooled her three sons for eight years prior to joining the faculty of NCA in 2009.

Jennifer Motes teaches 4th and 5th grade at Naperville Christian and joined our faculty team in 2011. Jennifer earned her Bachelor’s Degree in Elementary Education with a Mathematics minor from Duquesne University. She worked as a substitute teacher and tutor in the Pittsburgh area after graduating and also served in Children’s Ministries for six years. She and her husband Phillip married in 2011.


Upper School Faculty

Adam Bloom teaches Upper School Humanities and Logic classes.  Mr. Bloom has a Bachelor’s Degree in Christian Thought from Grove City College and a Master’s Degree in Historical and Systematic Theology from Wheaton College.  Mr. Bloom served as an Editorial Assistant with Crossway Books prior to joining Naperville Christian Academy in 2008.

Scott Hermann teaches Upper School Humanities and Math classes.  Mr. Hermann has Bachelor’s Degrees in History and International Relations from Wheaton College and is currently finishing his thesis towards a Master’s Degree in Secondary Education from Wheaton College.  Mr. Hermann joined Naperville Christian Academy in 2008.

Josh Jacobs teaches Upper School Science and Math. Mr. Jacobs joined NCA in 2010.  He graduated from Wheaton College with a B.S. in Biology and has been working and researching in the field of biology over the last 2 years at the University of Illinois at Chicago and the Morton Arboretum.  He has a deep love for the beauty of the creation and has been actively involved in organizing and leading fellowship in the local Christian community.  Josh has a passion for worship, evangelism, and prayer.  He has worked in camps and done evangelism and training with Young Life and Youth With a Mission.  Mr. Jacobs lives in Wheaton and attends Church of the Resurrection.

Adam Stevenson is our Upper School Principal.  He teaches Upper School Humanities and Greek. Mr. Stevenson joined NCA in 2010.  Adam is a graduate of Moody Bible Institute, where he earned a B.A. in Biblical Languages, and Wheaton College, where he earned M.A.’s in Historical and Systematic Theology and Biblical Exegesis.  He has also done additional post-graduate work at Marquette University.  He loves sports and played soccer throughout college.  In his spare time he enjoys going on walks with his wife, reading, playing guitar, and running around on the soccer field.  He has taught in Sunday School and VBS, and has led small groups for college students.

Dorie Ytterberg teaches Upper School Math. Mrs. Ytterberg joined NCA’s faculty in 2010, having already been a regular substitute with us.  She earned her B.A. in Math from DePauw University and her M.A. in Math Education from DePaul University in Chicago.  Dorie and her husband, Brian have 4 children and live in Naperville.  Mrs. Ytterberg has been active at their church, Naperville Presbyterian, where she has run kids’ bible studies, hosted a small group with her husband, and worked with the youth choir.  Dorie has taught for 8 years and tutored math students from many area schools for the last 19 years.


Supplemental Faculty

Linnea Bonenberger works part-time teaching classes in the grammar school at NCA. She graduated from Oral Roberts University with a BS in Accounting and a BA in Spanish. She worked as a CPA during her career in accounting followed by 15 years of homeschooling with her daughters. She and her husband, Tom, attend Redeemer Community Church in Oswego where they have served as small group leaders and worked in children’s ministry. Linnea has served in the past on the governing board of Teen Missions International. Linnea and Tom have been a part of NCA since 2011 and have a daughter who will be a senior this year.

Holly Baker is our Physical Education teacher.  Ms. Baker has a Bachelor’s Degree in Physical Education, Health, and Recreation with a Minor in Psychology from North Central College, where she was a three time All-American Sprinter.  She is ASEP, CPR/First Aid certified, and has coached and run many sports teams and camps.  Ms. Baker has worked as an exercise physiologist and personal trainer in fitness centers and has taught Physical Education in private schools for 15 years.  Ms. Baker joined Naperville Christian Academy in 2002.

Janice Wood is our Art teacher.  Mrs. Wood has a Bachelor’s Degree in Advertising Design and Illustration from the Art Center College of Design.  With over 25 years of experience as an illustrator, designer, and fine artist, she has illustrated numerous children’s books, magazines, and educational products, and has taught art at the College of DuPage.  Mrs. Wood joined Naperville Christian Academy in 2009.