781 860 7550 info@lexingtonprep.com

At LPS, we know that the quality of instruction plays a key role in a student’s individual academic success, and that excellent teachers motivate students to strive for excellence. Our highly skilled and experienced professional faculty takes an active interest in both developing dynamic curricular materials, and meeting the unique needs of international students.

Our teachers:

  • Hold advanced professional degrees from elite U.S. universities, including Harvard, MIT, Boston College, and the University of Texas
  • Communicate passion for their subject matter
  • Engage students with highly interactive teaching methods
  • Have demonstrated success teaching international students and non-native speakers of English
  • Enjoy helping adolescents reach their educational goals

All LPS teachers are native speakers of English. Many have lived and taught in international environments as well as within the U.S., giving them special insight into the experiences of international students.

Dr. Kim Winsor
Director of School

Dr. Kim Winsor earned her Bachelor’s Degree at Gordon College and her Master’s Degree and Doctorate at Boston University.  She started at LCA in 1980 and has served in a variety of roles including librarian and teacher of grades 6-12 before joining the administrative team.  The Cultivating Inquiry program began as a result of her doctoral work.  Dr. Winsor is an avid reader and is frequently invited to speak at conferences and conventions. Her professional interests include faith-infused learning, literacy, school leadership and curriculum.

Having grown up in New Jersey, Dr. Winsor loves the Boston area. She never tires of sightseeing in Boston and enjoys sharing her favorite places with her granddaughter, Trinity. She has a golden retriever named Misty.

Mr. Samuel Ko
SAT / SSAT Instructor

Sam began working at Lexington Prep School in March 2015 as an SAT instructor, where he also taught ACT, SSAT, and TOEFL; in May 2016, he took the position as academic director. Sam has prior experience teaching, working with (international) students, standardized testing, and college counseling. He has also worked abroad in Korea as an official SAT essay grader, and has worked as the editor for several, published standardized test books. Sam also has experience teaching middle and high school English, Math, and Spanish in the United States, and a variety of other subjects in South Korea, Bolivia, MIT, Bunker Hill Community College, and MATCH Public Charter High School. Sam graduated from Boston College cum laude in with a major  in English at the College of Arts and Sciences and a major in Applied Psychology & Human Development at the Lynch School of Education; he graduated from Harvard with a master’s degree in Religion Literature, and Culture. Sam hopes that his experiences will be able to help and serve students from around the world who aspire to matriculate in the United States.

Mr. Sam S. Jwa
SAT/SSAT/SAT2 Math Instructor

Mr. Jwa has a strong interest in developmental mathematics. He obtained his M.A. Degree in Mathematics from the University of Texas at Austin, where he taught advanced Calculus, Business Calculus, and Algebra for three years. He also earned his M.S. Degree in Electrical and Computer Engineering from UT Austin, and a B.S. Degree in Electrical Engineering from Yonsei University, Seoul, Korea. His work experience includes computer programming and mathematical applications at Samsung in Seoul, Korea, and the Air Force Research Lab in Dayton, OH. He has been applying his problem solving skills to help many students succeed in SAT, SAT2 Math, Calculus AB/BC, etc. He truly loves mathematics and loves to help students with this beautiful subject.

Ms. Denise Frame Harlan
Writing/College Essay Instructor

During the school year, Denise Frame Harlan teaches The Great Conversation: Gordon College’s first-year writing course. In addition, Denise helps high school students to develop powerful, clear college application essays, and she coaches students through the English portions of the SAT. Denise’s story “Smoke Rings” won an honorable mention in Ruminate Magazine’s 2013 nonfiction contest, and she won the 2011 culinary writing fellowship from Dairy Hollow Writers. She holds an MFA in creative writing from Seattle Pacific University.

Mr. George McKibbens
SAT / SSAT / TOEFL Instructor

During the school year, Mr. Kibbens teaches History and English at a prominent private boarding school in Connecticut.  He has prepared students to take the TOEFL for years while living in China and he also has taught ESL one-on-one and in groups.  Mr. Kibbens enjoys meeting new students from different countries exploring the differences and similarities in everyone’s culture.  He also loves to incorporate world events into his lessons to help students understand the nuances in English writing.