Diverse Problem Solvers

Meet our math department

From left to right: Arjen Krijgsman, Tom Pearson, Andy Yao, Janina McClester, Rebecca Leon Guerrero, Susan Mannino

The St. John’s School math department consists of 6 faculty, the majority of them holding a master’s degree in their field of expertise, with over 100 combined years of teaching experience.

From General Math courses to IB Higher Level Math, a student’s math teacher at St. John’s may have been a resident of Egypt or the United Kingdom, or served in the Peace Corps in Africa.

Well spoken, these teachers combined have studied over 15 different languages, from Swahili to Russian, and have traveled to over 150 countries.

Tom Pearson, the head of the math department, has been teaching at St. John’s for over 22 years and is distinguished not only within the St. John’s community, but island-wide, hosting radio shows and making significant impacts to improving Guam’s environment.

Pearson says, “Our major goal is to make sure our students are well-prepared for college, whether that be by following the AP program, the IB program, or both. This year we brought back IB Higher Level Math – the most rigorous high school math course available”.

“The biggest difference is our offering of IB math courses. No other school on Guam does this,” he continued.

St. John’s students enjoy small class sizes, amazing friendships and dedicated teachers who will get to know and support them. The department maintains long-lasting relationships with alumni, who often return to campus to help guide and mentor.

The strength of the math department is the diverse and impressive group of professionals who are devoted to the success of their students and changing lives the world over.

Math courses available for the Middle and Upper School are listed below.

Middle School

General Math 6
Pre-IB2 Math
General Math 7
Algebra I

Upper School 

Pre Algebra
Algebra I
Algebra II
Pre IB 5+
Pre Calculus
Advanced Math
IBS Math Studies
IBS Math Standard
IB Higher Level Math
AP Statistics
AP Calculus AB
AP Calculus BC

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