Cornerstone Christian School

Christ-Centered Education
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Principal Letter


We build everything upon a foundation of Christ and a Biblical worldview, but that does not come at the cost of academic excellence; rather, our excellence is enhanced by a proper framework."

Cornerstone Christian School


Cornerstone Christian School has been blessed with certified teachers who strive to provide the best education for your child. With smaller classroom sizes, there is more individual interaction with the teachers to provide an excellent education.



Sandra Nettleingham // Principal

Mrs. Nettleingham received a Bachelor of Arts in Elementary Education with an emphasis in Music from Cedarville University. She completed her Master of Science in Administration, majoring in Educational Leadership, at Madonna University in 2007. Her teaching experiences include English, Music, Creative Writing, Yearbook, Speech, Drama, and Preschool. Mrs. Nettleingham taught music and preschool at CCS before moving to school administration. Ten years ago, Mrs. Nettleingham became Principal at Cornerstone Christian School, where her passion is to educate students with a Christian worldview.

Lisa Giammalva // Assistant Principal

Mrs. Giammalva brings sixteen years of classroom teaching experience to Cornerstone. She received her Bachelor of Science degree from Western Michigan University and her Reading Endorsement from Eastern Michigan University. Mrs. Giammalva is always ready to help students and teachers with a smile. She started working at CCS in 2012 and became Assistant Principal in 2017.



Marina Cleis // Kindergarten

Ms. Cleis earned her Bachelor’s Degree in Elementary Education and Special Education from Eastern Michigan University. She has experience working in ministry with middle school students, high school students, and youth with special needs. She loves hiking with her dog, traveling, and spending time with friends. Ms. Cleis joined our teaching staff in 2020.

Laura Elliott // 5th Grade

Mrs. Elliott received her Bachelor of Arts degree in Elementary Education and her Master of Arts in Curriculum and Instruction from Michigan State University. She has over 25 years of experience as a middle school classroom teacher in the Fowlerville Community Schools. She has presented at conferences integrating math, science, and technology, served on numerous committees designing curriculum, and established a writing club. She lives in Brighton with her husband and two children. Mrs. Elliott has been at CCS since 2018.

Susan Karczynski // 3rd Grade

Mrs. Karczynski received her Bachelor of Arts from the University of Michigan Dearborn and graduated with a Master of Arts in Teaching from Wayne State University. She has experience teaching second and third grade in the Westwood District for ten years, as well as teaching five-year-old preschool in South Lyon. In her free time, Mrs. Karczynski enjoys biking, kayaking, and exploring Michigan with her husband and two children. Mrs. Karczynski joined the CCS staff in 2017.

Chivonn Quist // 2nd Grade

Mrs. Quist graduated from the University of Saint Francis with a degree in Elementary Education and Special Education. She taught 2nd grade, 5th grade and was an intervention specialist at a middle school before becoming a stay-at-home mom of Charlotte and Taylor. Mrs. Quist enjoys hobby farming with her family and spending time with friends and family.

Christ Smet // 4th Grade

Mrs. Smet has over twenty years of teaching experience. She earned a Bachelor of Science in elementary education from Wayne State University. She has been married to her husband Mark for 38 years, and they have three children. Her youngest daughter attended CCS. Mrs. Smet enjoys time with her family, singing in her church choir, hiking, reading, and visiting Northern Michigan.

Dianne Turner // 1st Grade

Mrs. Turner has 20 years of experience working with students as a classroom teacher and as an elementary administrator. She spent most of those years teaching kindergarten but has also taught 5th, 6th and, multi-age elementary classrooms. She holds a Bachelor of Arts from Spring Arbor University and a teaching certificate and Master of Arts in Reading from Eastern Michigan University. Mrs. Turner is married and has two children in college. Mrs. Turner began her work at CCS in 2016.

Middle School


Rachel Buchanan // Middle School

Mrs. Buchanan graduated from Calvin College in Grand Rapids, where she received a Bachelor of Arts in Elementary Education. Her experience in the field of education includes six years teaching full-time at CCS middle school and seven years in various roles (Lead Teacher, Director, etc.) at the Sylvan Learning Center in Brighton. She loves reading, gardening, kickboxing, and spending time with her husband and three children.

Sara Bykowski // Middle School

Mrs.Bykowski received a Bachelor of Science in Elementary Education and Life Sciences from Tri-State University in Angola, Indiana. She has 28 years of teaching experience in self-contained elementary grades, Middle School Science, and English as a Second Language. Mrs. Bykowski has also been a presenter at educator workshops on the topics of elementary school science, differentiated instruction, and connecting Science with Literature. She was a State of Indiana nominee for the Presidential Award for Excellence in Mathematics and Science Teaching in 2005. She began teaching at Cornerstone Christian School in 2006.

Jeanne Strandbergh // Algebra / 8th Grade Math

Mrs. Strandbergh graduated with a Bachelor of Science in Environmental Science and a Minor in Chemistry from the University of Michigan. She worked as an Environmental Chemist until her eldest daughter was born. She enjoys playing her piano and reading. Mrs. Strandbergh has taught for over 14 years.



Nancy Cullen // 3S & 4S

Mrs. Cullen received a Bachelor of Arts in Elementary Education from Michigan State University and a Master of Education degree from Kennesaw State University in Georgia. She taught Kindergarten in Georgia for seven years and worked for the St. Clare Shore District as a Kindergarten-3rd Grade Reading Intervention teacher for two years. Her professional activities have included Language Arts Curriculum writing and participation in both Curriculum and Kindergarten Assessment Committees, among others. Mrs. Cullen joined Cornerstone’s preschool program in 2009.

Linda Hunt // Preschool

Mrs. Hunt attended Michigan State University for two years. She’s been married to Dr. Hunt, a Pastor at Cornerstone EPC, for 50 years. Over the years, she has worked in various preschools as an aide. She’s enjoyed working as a preschool aide at CCS for seven years with Mrs. Nancy Cullen. Linda was excited to have the opportunity to return this year to assist in the four-year-old classroom! Linda has three grown children and nine grandchildren. She enjoys reading, hiking, and traveling.

Stephanie Petroskey // Beginnergarten

Mrs. Petroskey is the Beginnergarten class lead teacher. Stephanie earned a bachelor's degree in elementary education with a concentration in early childhood education from Martin Luther College and a master's degree from Oakland University in early childhood education. Prior to working at CCS, she taught elementary education, various preschool levels, middle school art, and social studies, along with being an assistant director at a nationally accredited early childhood program. Stephanie is a South Lyon resident with her family and is excited to join the Cornerstone team.



Deanna Baker // Arts

Mrs. Baker earned her Bachelor of Fine Arts degree with a concentration in Graphic Design from Eastern Michigan University. After graduating, she moved out to Seattle, Washington, and freelanced for Wizards of the Coast before finding her dream job at Nintendo of America. There, she created logos and layouts for Nintendo Power Magazine, Player's Guides, and Manuals. After starting a family, the Bakers moved to Michigan and started their own functional art business, where they feel blessed to use their God-given talents to help others. Mrs. Baker has taught many workshops but is excited to teach and create with everyone at CCS!

Cori Kurncz // Physical Education

Mrs. Kurncz received a Bachelor of Arts degree from the University of Michigan, Dearborn, and is a certified personal trainer. Professionally, she has worked many years in both children's and youth ministry. In addition to ministry work, she has eleven years of combined professional coaching experience as a gymnastics, fitness, strength, pom, and cheerleading instructor. Mrs. Kurncz began teaching at Cornerstone in 2010.

Rachel Olson // Music

Mrs. Olson earned her Bachelor of Arts degree in Vocal Performance with a minor in Piano Pedagogy from Oakland University. She has shared her enthusiasm for music and Jesus through private teaching of piano and voice lessons for over 16 years. She has directed and arranged music for vocal groups and performs as a professional soloist regularly. Along with her joy of teaching music to CCS students, Mrs. Olson is Director of The Cornerstone School of Fine Arts.

Rebekah Pollard // Spanish

Mrs. Pollard graduated from Eastern Michigan University, where she received a Bachelor of Arts in Literature and Spanish for Secondary Education. She has seven years of experience teaching high school students in Colorado and middle school students in Detroit, MI. In her free time, she enjoys hiking, reading, knitting, and spending time with her husband, son, and dog. Mrs. Pollard joined our teaching staff in 2016.

We're Hiring

Cornerstone Christian School is currently accepting teacher applications for the 2021/2022 school year. Applicants must be certified and have a love for the Lord. Call for more information.
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