Our Teachers

Lead Teachers

Karl Safe graduated from Southeastern Oklahoma State University with a degree in Communication and is certified in English/Language Arts and Speech/Drama/Debate. He has taught 11th grade American Literature for the past two years at Oklahoma Virtual Charter Academy, as well as taken on many leadership roles within the district, allowing him to transition to this lead role at ISOK seamlessly. Additionally, Karl brings years of experience that has been extremely valuable to our school community. He believes in putting students first, and cares deeply about the success of all students. This is his 11th year in education. He enjoys spending time with his wife and 2 children and rooting on the NFL's Buffalo Bills.


Anna Boxell teaches English 2 at ISOK. This is her second year with ISOK, but her 6th year in education. She graduated from the University of Tulsa in 2011 and is certified in Middle and High School English and AP Language.

David Brown is a high school teacher who joined the K12 team in 2018.  He brings 12 years of experience in education. David earned a BS in Education from Oklahoma Christian University. He holds certificates in Math, Kinesiology and Computer Science.

Ashley Deskin is a high school English teacher at Insight of Oklahoma, specifically focusing on 11th grade American Literature. While this is her first year with an online school, she brings more than 10 years of experience in the education field. Mrs. Deskin has her BA in English from East Central University, and she holds her certification in English as well.

Jason Deskin is a high school science and electives teacher, with a true passion for CareerTech and Agricultural Education. He joined the Insight of Oklahoma team in July of 2018. He brings a diverse teaching background and a unique skill set to ISOK, being the only Ag Ed teacher in the school. He earned his in B.S. in Agriculture Education from Oklahoma State University in 2000.

Deanna Duerson is a secondary science teacher who joined the K12 team in 2011. She is a 35-year veteran teacher. She majored in Biology and minored in Education. She attended Oklahoma State University and Southeastern Oklahoma State University.

Kelli Hamrick is a history teacher with ISOK and this is her first year with K12 Schools. She has 5 years’ experience in education, previously teaching 8th American History. Mrs. Hamrick earned a BA in Secondary Education from Oklahoma State University. Go Pokes!

Regina Harris is an English IV teacher who joined the K12 team in 2018. She brings 12 years’ experience in education, community service and Oklahoma Home and Community Educators. Regina earned her BS in Education from Northeastern State University and M Ed in Counseling and School Psychologist from East Central University. She holds certificates in Early Childhood, Special Education (Mild-Moderate), Elementary Education, Language Arts 6-8, Science 6-8, Counseling and School Psychologist.

Jason Harrison is a 7th and 8th grade history teacher. He's been with K12 for 1 year and has 10 years of teaching experience. He attended Oklahoma State University and still lives in Stillwater. He holds certificates in Elementary Education and Physical Education.

Jeffery Holmes is a 7th and 8th grade math teacher who joined the K12 team in 2018. He brings more than 10 years’ experience in education, community service, and development. Jeffery earned a BA in Elementary Education from Oklahoma State University, and a Master’s Degree from East Central University. He holds certifications in elementary education, middle school and high school math.

McKenzie Janzen is a high school teacher who joined the K12 team in 2018.  She brings experience in the fields of math and science.  McKenzie earned a BS in Biology from Oklahoma State University, and a MEd in Secondary Education from Northwestern Oklahoma State University.

Ashley Laufer is the middle school interventionist. She is certified Elementary Education, receiving her BS in Elementary Ed from Southwestern Oklahoma State University. She taught pre-k for 3 years and one year of 4th grade before joining the Insight team.

Ashley Louk is a High School math teacher with 12 years of experience in education. She joined K12 in 2018.  Ms. Louk holds a BS in Mathematics Education from Oklahoma Baptist University and a MS in Mathematics from the University of Tulsa. She is certified to teach all levels of secondary mathematics. 

Michelle Martin is ISOK's High School Interventionist for both Math and English. She joined K12 5 years ago and has been teaching for 7. She earned her BA in English Education at the University of Delaware. Though she earned her degree in English she immediately got her math certification as her passion is in both subjects.

Jennifer Pace is a high school history and elective teacher. She joined the K12 team in August of 2018.  She has over 9 years of classroom experience in a brick and mortar school where she has taught US History, OK History, and Psychology. She earned her Bachelor’s of Science in Education with an emphasis in History from Missouri Southern State University in 2004. 

Kayla Richards teaches 7th and 8th grade English at Insight School of Oklahoma. She graduated from the University of Oklahoma with a degree in English Education.

Carrie Smith is a high school math teacher who joined the K12 team in 2018. She has been teaching math for 17 years. She has a BS in Mathematics from Southern Nazarene University.

Lisa Stiefel is a high school science teacher. She came to K12/ISOK in 2016 after 10 years in a B&M as a teacher and coach. She has a BS degree in Secondary Science Education from Northeastern State University.

Sheena Walker is the 9th grade English teacher at ISOK.  While she has 8 years of teaching experience, this is her first year at Insight.  Mrs. Walker obtained her BA in English Education from Southwestern Oklahoma State University and her MS in Library Information Media from the University of Central Oklahoma.  She holds certificates in 6-12 English, Pk-12 Art, and Pk-12 Library.

Richard Wells is a high school history teacher who joined the ISOK team in 2018. Mr. Wells earned a BA in Psychology/History from the University of Tulsa and a MA in Education from Oral Roberts University. Mr. Wells holds teacher certification in Elementary Education, Social Studies, English, and Psychology/Sociology. Mr. Wells has over 20 years of experience in the educational field.


Sheryl Tatum is the Head of School. She joined the K12 team in 2009 and has been serving as Head of School since 2013 (2014 for ISOK). Sheryl has 20 years’ experience in education. She earned a BA from Eastern New Mexico University and a MA in Curriculum and Instruction from University of Phoenix.

Audra Plummer is beginning her 10th year with OVCA/ISOK. She has been with the schools since 2009. She began her online teaching career, as an OVCA teacher assigned to families with three or more students with one learning coach. Mrs. Plummer as served as Master Lead, Elementary Principal, Interim Principal at ISOK and is currently Deputy Head of Schools. Prior to working at OVCA/ISOK, Mrs. Plummer taught in public schools for 14 years in the Norman Public Schools. She has a Master's Degree in Instructional Leadership and Academic Curriculum from the University of Oklahoma. In 2004, Mrs. Plummer earned National Board Teacher Certification.


Dr. John Morrison has  been in education for over 12 years. Dr. Morrison has a PhD in Educational Leadership from the University of Oklahoma. This is his 5th year with K12, he taught at ISOK the first year it was open before transitioning to the role of regional instructional coach for K12. He is excited for the opportunity to serve as ISOK Principal and looks forward to working with ISOK students as they grow and achieve their academic goals.

Cady Looper is the Southern Regional Engagement Principal. Cady graduated from Oklahoma State University in 2004 with a bachelors in Elementary Education. She joined OVCA in 2010 and taught elementary for 5 years before transitioning to lead the FAST team in 2015. This school year will be her 15th year in education and 9th year at OVCA. Cady lives in OKC with her husband and two little girls.

Sandra Powell is a Regional Engagement Principal serving students in grades K-12th. She joined OVCA in 2010, first as a High School teacher then spent the last 6 years as the Middle School Principal. She has more than 20 years of educational experience in both private and public schools in Indiana and Oklahoma. She holds a Bachelor of Science degree in Education with majors in biology, chemistry and a minor in physical science from the University of St. Francis in Fort Wayne, Indiana and holds a Master's Degree in Curriculum Design and Development from Grand Canyon University.


Kimberly Brown joined ISOK in 2016 as Special Education Manager. Kimberly holds a bachelor's degree in Elementary Education from the University of Oklahoma. While completing her Master of Arts degree in Psychology at the University of Central Oklahoma, Kimberly achieved specialist-level certification in School Psychology.  She began her career in education as an elementary school teacher and practicing as a school psychologist since 2006.  As a school psychologist, Kimberly worked with children, youth, families, and educators to prevent and solve individual, school, and family-related problems. She believes all children and youth have a right accomplish meaningful goals and maximize their full potential. 

Courtney Love is the Operations Manager for the Oklahoma Virtual Charter Academy and the Insight School of Oklahoma.  She has been in her current role as an Operations Manager for 5 years and was an elementary teacher for 9 years prior to that.

Deborah Mackey is the School Communications Administrator. She joined the K12 Oklahoma team in 2012. She brings more than 17 years of experience in education and earned her degree in Business Administration from Rogers State University. She has served as an Academic Advisor, Student Activities Facilitator, and Mentor at high school and college levels.

Ryan McDonald is the Assistant Operations Manager for both OVCA and ISOK. He joined the team in September 2014, and became the Enrollment Coordinator and Office Manager in September of 2015. Ryan earned his BS in Psychology, with a Minor in Philosophy, from Oklahoma State University in December of 2009. Previously, Ryan collected workplace injury and illness data for the Oklahoma Dept. of Labor and also worked on the 2010 US Census.

Heather Miles is the School Data and Accountability Manager. She began at OVCA in the middle school as an English teacher in 2013, transitioned to a lead teacher role in 2014, and moved into her current role in 2016. Heather earned a bachelor's degree in Elementary Education from Northwestern Oklahoma State University and a master's degree in Educational Leadership from the American College of Education. She is certified in Elementary Education, Middle School English, and Physical Education. Before coming to OVCA and ISOK, Heather taught third and fourth grade in brick-and-mortar.

Alissa Selby earned her bachelor's degree in English Education from Northeastern State University in Broken Arrow and has five years of teaching experience in middle and high school English. Previously an OVCA middle school teacher from 2009-2011, Ms. Selby has served as the Local Development Manager since 2011.