Our Academic Coaches

Cheryl Koslosky

ACT/SAT Prep Coach, Director of The Center for Lifelong Learning. After graduating from Taylor University in 1993, Cheryl taught elementary and middle school in King George, Virginia near Washington DC.  When she had her first child, she quit teaching and started tutoring students in all subject areas. She has been tutoring for over two decades. She has spent many years studying and getting to know the ins and outs of the two standardized college admissions tests: the ACT and SAT. 

Holly Taritas

 Executive Functioning Coach.  Holly is a former high school teacher and administrator at Wheaton North High School.  She currently teaches student teachers at Grand Canyon University online.  She has a BS in Child Development and an MS in Education.  Executive Functioning is her passion as she reminds her students that we are always learning, growing and improving.

Liz Reid

Elementary Academic Coach / Executive Functioning Coach: Reading Skills, Reading Comprehension, Critical Thinking Skills, Study Skills, Writing Process and Techniques, Spelling, and Grammar. Liz is a graduate of St. Mary’s University. She has an MN and BA in Elementary Education and a Masters in Reading from Concordia College. Liz has taught 1st, 3rd, 4th, 7th, and 8th grades for the last 25 years. More recently, her teaching experience has been with a local homeschool co-op and is currently teaching preschool in Wheaton. Liz creates a fun, positive learning experience to help meet personal goals and has enjoyed tutoring for the last 25 years.

Kristen Rusthoven

English/Language Arts, Reading/Writing, ACT/SAT, Study Skills and History. Kristen is a graduate of WCGS, Wheaton Academy, Trinity Christian College (B.A) and Olivet University (M.A.E. Reading Specialist). She is a certified teacher endorsed to teach History, English/Language Arts, and is also a certified Reading Specialist. She has experience working with all ability levels and has been teaching for 10 years. She has experience teaching study skills classes and literacy intervention classes. She is also an English and Reading ACT/SAT prep coach. Kristen is currently teaching English at Wheaton Academy.

Val Gregersen
Valerie Gregersen

Middle School through High School Math (Algebra 1 and 2, College Algebra, Precalculus, Precalculus Advanced, ACT/SAT Math Preparation) Val graduated from Northwestern College, IA with a BA in Secondary Education and Mathematics.  She has taught high school and middle school math for over 25 years. Her first 11 years were in Houston, TX and the last 15 years have been at Wheaton Academy.  Valerie truly believes that all students can learn math and reach their full God-given potential. 

Dick Clancy

Middle School and High School Math (Algebra and Geometry) and High School Science (Physics; Chemistry; Biology; and A. P. Environmental Science).  Dick graduated from Boston College with a B.S. in Chemistry and Mathematics. He received his Masters Degree (Ed.M) in Continuing and Secondary Education at the University of Illinois.  Dick has taught high school and junior high school students for twenty-five years and enjoys helping students reach their learning goals for the Lord.  

Lars Cassel

Middle School through High School Math (Algebra 1 and 2,
Geometry, College Algebra, Pre-Calculus, Calculus)
Lars is a Wheaton Academy graduate and a senior Math/ Secondary Education major at Wheaton  College. He loves learning about math and seeing how the material he learns in the classroom is played out in the real world.

Luke Bothun

College Essay Writing, Paper Editing, ACT/SAT Prep, and Science (Anatomy and Biology). Luke is a junior at Wheaton College and is studying for a Business Economics major and a Biology minor. He is from Rochester, Minnesota and runs Cross Country and Track for Wheaton College. Luke is looking forward to meeting students to discuss paper writing, testing strategies, the human body, and cellular respiration!

Grace Flitsch

Middle School through High School Math (Algebra 1 and 2, College Algebra, Geometry, Pre-Calculus, Calculus AB and BC, Stats) Grace is from the Seattle area and is currently a senior at Wheaton College. She is majoring in Math with Statistics and minoring in Computer Science. She is enthusiastic about math and is excited to work with students. 

Stacey Krohn

Stacey is a graduate of Linfield University (B.A Spanish) and Cairn University (M.S. Education).  She has experience working with international students and all ability levels in Spanish and/or English. She was a classroom teacher for 13 years, 8 of those years in International Schools in Peru and Ethiopia. She is currently teaching Spanish at Wheaton Academy.

Sean McCallum

Art – BA Studio Art, Wheaton College, MFA Illustration, Academy of Art University. Sean has been at WA since 2011. He made the transition to traditional education from a vast array of experiences in the creative world.  Most recently, he has worked as an independent consultant and has held a variety of design roles.  In addition to his past formal roles in student ministries at Harvest Bible Chapel and Wheaton Bible Church, he and his family remain active in the local church.  He brings a love for painting and drawing, and desires that art tells a story.  Sean has interest in the outdoors including camping, mountain biking, and adventure outings.

Alyssa Strzalka
Alyssa Strzalka

College Essay Writing, English/Language Arts, Paragraph/Essay Writing. Elementary through High School.  Alyssa is a Wheaton Academy graduate (2015). She graduated from Baylor University in 2019 with a B.S. in Education and minor in Creative Writing and completed her first year of teaching at Harvest Christian Academy before joining the Wheaton Academy English Department in 2020.

Ryan Chaney

Math  Ryan received his BA degree from Cedarville University and his MEd in Curriculum and Instruction from the University of Cincinnati, then earned his Professional Educator License from National Louis University.  He taught high school and middle school mathematics for 3 years at a private school in MD and taught 4 years in the Mathematics department at Wheaton Academy.  He enjoys helping students develop an appreciation for mathematics and helping them see how mathematics provides the framework for us to model and understand the world around us. 

Tim McDunn

ACT/SAT Prep Tim serves as Guest Lecturer in Music Theory and Composition at Wheaton College. He has mentored students of all ages in test prep, music theory, Latin, ESL, math, and other subjects.  At the secondary level, he has taught Latin and music at Ridgeview Classical Schools in Colorado, Latin at Liceo Classico Berchet in Milan, and ESL in Monza, Italy.  He has also tutored immigrant children as a volunteer at the after-school program for Santissimo Redentore church in Milan. With a passion for learning and servant-minded attitude, Tim is excited to share with students the academic strategies he’s learned from his broad experiences.