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Urgent: We are pleased to introduce our new Rising Threes Preschool Program, designed for children who turn 3 years of age during the academic year. Before and after care available. Applications now being accepted.

To learn more or take a tour, please contact our Admissions team at (773) 998-BISC or click on the following link: Request a Visit

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  • Highest Quality Learning

    Our personalized approach engages and challenges students, empowering them to reach their highest potential.

    British International School of Chicago, South Loop

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    British International School of Chicago, South Loop

  • Exceptional Teachers

    Our highly qualified, energetic and experienced staff is focused on developing children's unique learning styles.


  • Our Unique School Day

    Sometimes focused and other times fun, the school day is always inspiring.


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    British International School of Chicago, South Loop

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    Our varied athletics programming fosters sportsmanship, competition and discipline.

    British International School of Chicago, South Loop | Private School Chicago

Mark Jantzen

British International School of Chicago, South Loop | Private School Chicago

U.S. Studies Specialist

My passion to teach in a rigorous school with an emphasis on personalized learning made the decision to join British International School of Chicago, South Loop an easy one. This school is different to all others I have worked at because of our commitment to excellence at every level, which produces great outcomes for every student.

I joined the team at British International School of Chicago, South Loop after having taught English Language and English Literature for three years at Sandbach School for Boys in Cheshire, England. I received a bachelor's degree in English Literature from Lancaster University, where I spent a year as an exchange student at Michigan State University, and I hold a master's degree in English Literature and American Studies from University of Manchester. I also have a PGCE in Secondary English from Edge Hill University, where I trained in a number of outstanding schools in the Greater Manchester area. 

I was born and raised in Warrington in the northwest of England. At a young age, I developed a love of literature and history and, in my spare time, I enjoy reading, creative writing and weight training. I also have a deep interest in Western philosophy, political theory and Anglo-American history. I have traveled widely and most recently spent my summer backpacking through Thailand, Cambodia and Vietnam.

What Students Say 

"Mr. Jantzen is a great English teacher, and his lessons are always fun and engaging."

"Mr. Jantzen has a vast knowledge of literature and history!"

"Mr. Jantzen is a helpful, inspiring and enthusiastic teacher –but he supports the wrong Manchester football team!"