Jason Arant is the founder of OSIEL. He has been an educator for 21 years. He received his bachelor's degree in Secondary Education from Oklahoma State University and later earned his master's degree in Educational Administration from Texas A&M-Commerce and his Principal's Certification from Northeastern State University. 

Jason is a lifelong learner whose career has taken him to Texas, Puerto Rico, and Oklahoma. Throughout his journey, he has excelled as a classroom teacher, department head, curriculum developer and district mentor. "Teaching is my passion. I have known that this was my calling from an early age." 

Jason enjoys coaching baseball, attending church, travelling, and spending time with his two kids, Audrey and Ethan. 

Jackie received a Bachelor's degree in Language Arts Education and a Master's Degree in English and Linguistics, both from Universidade Federal de Uberlândia (UFU) in Brazil. She worked in the corporate world for many years but never abandoned the role that she loved the most, teaching. She has been with OSIEL since the beginning.


Jackie taught English (EFL) to high school as well as conversational Portuguese to adults seeking to expand their knowledge for travel and to  enjoy other cultures.


Jackie has 2 daughters: One starting college and another entering 10th grade. Both are representative of the creativity and positive outlook Jackie brings to OSIEL every day!

Tom Powers hails from Baltimore, MD and is a 1971 graduate of Baltimore Polytechnic Institute. He married his college sweetheart in 1975 after earning a bachelors degree in liberal arts from American Christian College in Tulsa. He earned his master's degree from Oklahoma State University in Educational Psychology with an emphasis on Gifted Education. Tom spent seventeen years in the corporate world before answering God’s call to become a classroom teacher. 


After nine years of teaching Science, he transitioned into the role of Gifted Education Specialist for Bixby Public Schools. In 2017, Tom had the honor of receiving the award for Tulsa Regional STEM Association Elementary Educator of the year. 


One of his greatest passions is work with children who exhibit love for learning and thrive on the challenges and freedom to explore and make mistakes. His other passions include teaching Sunday school, church camps, performing in live theater, and travelling with family.

Heather Weilacher

Tami Mostrom has a B.A. in English with a minor in journalism from the University of New Mexico. She has taught Comp II as an adjunct for Tulsa Community College and has tutored TCC concurrent enrollment students, primarily working with the Composition students. She teaches Literature & Composition, Speech, and Logic classes for Jr. High and High School homeschooled students, teaches upper level Language Arts for OSIEL, and also works as a private tutor. Tami has a passion for literature and for teaching students the skills they need to write well and succeed in college.


Tami and her husband have three children and beagle. Her favorite pastimes include spending time with her husband and their children, going on walks with her husband, reading really good books, listening to music, relaxing at the beach, shopping, watching baseball and tennis, and meeting friends for coffee.

Eileen Bader grew up in St. Louis, MO and has a B.S. in Business Administration from the University of Tulsa. She spent 11 years homeschooling her children. Eileen taught various classes from preschool to high school in two different homeschool co-ops, served as a board member of her homeschool co-op, and worked as a private tutor.


Now that homeschooling is over, she stays busy teaching at Aspire homeschool co-op, teaching chemistry lab out of her home, and tutoring students in various subjects. She loves creating relationships with students as they learn new things, stretch outside their comfort zone, and build confidence.


Eileen enjoys spending time with her husband and two children, learning and teaching others about natural health, participating in Bible studies, reading, walking, and cooking.