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A Learning Community that Empowers Students to Achieve their Academic and Life Potential.


Dr. Alexandar Pethan

Dr. Pethan’s educational career took root more than 25 years ago when he volunteered to teach elementary school students to read. From that experience grew his appreciation for the craft and artistry of teaching. He taught Spanish and coached sports in the United States before continuing the profession in the Philippines. There, benefiting from the examples and mentorship of fellow teachers, coaches, and skilled administrators, he increasingly took on school leadership responsibilities. He then put these skills to use by serving as an administrator for dynamic school communities in Saudi Arabia, Beijing, and Kuwait. He feels fortunate to now serve as Raffles American School Superintendent where he hopes to build on the solid foundation of those who have come before him.

Demonstrating his commitment to lifelong learning, he has earned a bachelor’s degree in zoology and Spanish from the University of Wisconsin, a master’s degree in Spanish from Brooklyn College, a master’s degree in educational leadership from Lehigh University, and a doctoral degree in leadership and learning in organizations from Vanderbilt University.

James Elliott
Elementary School Principal

Mr. James Elliott is from Milwaukee, Wisconsin, and he joined RAS in 2020 as a teacher and admissions representative. Mr. Elliott holds a BA in Rhetoric and Writing from the University of Wisconsin-Milwaukee as well as Professional Teaching Licenses for Elementary Education and ESOL. His career in education began back in 2014 as a Pre-K teacher at a private school in Wisconsin, where he discovered his passion for teaching and mentorship. Since then, he has taught students at every level, from early childhood to university. Since joining RAS, Mr. Elliott has taught ELL, 4th grade, 5th grade, and a multitude of CCAs while also assisting the admissions department in enrolling hundreds of new students. James believes that authenticity is the key to properly pairing families with a school to ensure that it suits their child’s educational needs, and he utilizes his experience as an RAS teacher to educate prospective families about the opportunities that Raffles American School can offer them.

Darla Her
Elementary School Assistant Principal

Mrs. Darla Her is from Missouri, USA, and she joined RAS in 2022 as the Elementary School English Language Learner (ELL) teacher and Learning Support Specialist (LS) before becoming the Elementary School Assistant Principal. Darla holds a Bachelor’s degree in Childhood Education, a Master’s in Special Education from Nyack College, and an Education Specialist degree in Teacher Leadership from Southeast Missouri State University. Her career began in 2016 as a special education teacher at a charter school in New York City, where she worked closely with parents, teachers, and students to ensure all students had access to a quality and rigorous education. She has also taught special education and assisted in leadership roles in public schools in Missouri.  Since joining RAS, Darla has assisted in various projects for the school, including yearbook, founding the sewing club, and organizing standardized testing across the school. Darla believes that all students can learn and achieve their potential if the right supports are in place, and she is a passionate advocate for students to be lifelong learners in both academic and nonacademic skills.

David Hornby
Middle School Principal

Mr. David Hornby began his education career in Vancouver, Canada, as a Social Studies and PE teacher.  His first experience abroad to Japan was a 2-year plan; it’s now his 26th year of teaching and leading international schools.  His international experiences expand to China, Indonesia, and now Malaysia.  David studied for a master’s degree in educational management and has held roles as Pastoral Coordinator, Vice-Principal, Secondary Principal, and Head of School.  He is keen to support RAS students and families in reaching their unique goals and further developing RAS’s academic and extracurricular programs both on and off-campus.

David met his South Korean wife while teaching in Japan.  They have two sons who graduated from the IB diploma program and are studying at the University of Toronto, Canada.

Sok Wee Kho
High School Principal
Sok Wee Kho, a Singaporean native and alumnus of the National University of Singapore, brings a wealth of instructional experience to his Secondary High School Principal role. With extensive experience across the Cambridge, International Baccalaureate (IB), and Advanced Placement (AP) curricula, Mr. Kho is dedicated to ensuring that our school delivers high-quality education that meets the latest standards and embraces research-based approaches.

Passionate about empowering students to thrive in the 21st century, Mr. Kho is committed to fostering continuous growth in essential skills. He believes in cultivating an environment where students feel supported to make confident decisions, embrace challenges, and become lifelong learners.

Yinkon Her
Communications Director

Mr. Yinkon Her is from Denver, Colorado. He holds a Bachelor’s degree in Intercultural Studies with a concentration in Community Development from Nyack College in New York, where he also met his wife Darla. He began his career in Information Technology in the American Higher Education system, before eventually moving to the Primary and Secondary Education sector in 2018. Before Raffles, Yinkon and his wife worked at Jackson R2 School District in Jackson, Missouri, where she taught Elementary Special Education, and he continued his work in Information Technology. In addition to his work, Yinkon has held various community development roles such as mentoring youth and coaching a variety of sports.

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Christian Choyce
Boarding Director

Mr. Christian Choyce has been in education for 13 years and has a Bachelor of Education degree. His teaching experience includes History, Business Studies and Geography. He has been involved with boarding facilities for the majority of his schooling and professional career. Chris has been a head of department, head of a boarding facility, and a grade head. He is married to Natalie, a Pre-K teacher, whom he has known since Grade 1. Guiding and nurturing childrens’ development is a passion, a calling and a pleasure for Chris.

Andy Manion
Athletic Director

Mr. Andy Manion, an Australian educator, joined Raffles American School after spending three years at the Australian International School in Vietnam. With a Bachelor of Education and over 38 years of teaching experience in Physical Education, Andy has held significant roles as Head of PE Departments in both Tasmania and Queensland, as well as Director of Sport at a P-12 school on the Gold Coast. Recognized for his excellence, he received the Australian ‘National Excellence in Teaching Award’ in 1997 and was awarded Life Membership of ‘School Sport South Coast’ in 2015. Andy’s passions include cricket, golf, SCUBA diving, motorcycle touring, surfing, cycling, camping, and gym activities. He firmly believes that enjoyable active participation is key to personal, social, and physical development, and he is excited to share his experience and enthusiasm with others.

J. Casey Hammond
College Counselor

Mr. J. Casey Hammond joined Raffles American School in August 2022 as College Counselor. He brings a wealth of experience to this position. He previously worked at the university level in the United States and Singapore, where he developed and taught undergraduate courses for first-year students and helped them transition into tertiary education. A speaker of Mandarin Chinese and Bahasa Indonesia, he is a longtime resident of this region. He holds a bachelor’s degree from Notre Dame, a master’s degree from MIT, and a Ph.D. from Penn.

Dewi Pritchard
School Counselor
Dewi Nurcahyani Pritchard joined Raffles American School in November 2022 as a school counselor. She holds a Bachelor’s degree in Psychological Science and a Graduate Diploma of Psychology from James Cook University Australia. Additionally, Dewi has attained a Master of Education in Leadership and Management from The University of Sydney, Australia which provides her with a well-rounded perspective and commitment to nurturing the growth and well-being of students.

With a diverse professional history, Dewi has honed her skills and passion for working with students over the years. Her career journey includes valuable experience in the law enforcement training center, followed by working in the education aid programs under the Australian Embassy in Jakarta, Indonesia; and Childcare Centres in Sydney Australia. As a school counsellor, Dewi firmly believes in the inherent potential and uniqueness of every student. She is dedicated to guiding and supporting students on their journey towards acquiring the essential skills needed to reach their full potential.