High School Director

Martha Díaz Calle

I’m an experienced, determined and resourceful language educator. My teaching experience began as a French Teacher for the MEP and from then on I’ve worked non-stop as an English Teacher in different prestigious Costa Rican institutions as well as a Substitute Teacher for the Central Oahu District in Hawaii for several years. This opportunity gave me the chance to learn about various grade levels, school environments, and methodologies. I possess a Bachelor’s degree in French from the UCR and I have completed most of the courses to obtain the Master’s Degree in English as a Second Language at the same institution. In addition, I like to be up-to-date in my field and I’ve recently participated in workshops such as the use of technology in second language teaching at the University of Minnesota, PBL Learning, 21st Century Skills among others.

IB Coordinator

Ivannia Brenes

My name is Ivannia Brenes Flores and I am the Coordinator of the International Baccalaureate Diploma Program and I guide the students in the Theory of Knowledge class. I have been a teacher for twenty-eight years of which eighteen have been dedicated to the IB. I studied Spanish Philology at the UCR, I got a bachelor’s degree in teaching Spanish, a degree in teaching, and a master’s degree in educational administration. At the IB I have also taught Literature, Language Arts, and Self-taught. I love reading, gardening and I am an animal lover at heart and soul.

I am very honored to work at Saint Gregory and ready to help in what is required. I firmly believe in teamwork with families, in the open-door classroom where we can all participate and my goal is to fully empower each of the students to achieve their dreams.

Sports Coordinator

Marcela Reyes

My name is Marcela Reyes Jiménez. I have a degree in Teaching with an emphasis in Physical Education graduated from the Universidad de Costa Rica and the UNED. I have 18 years of experience in teaching preschool, primary and secondary school, as well as a University professor at the Universidad Internacional de las Americas.

I have 18 years of experience as a coach of institutional cheerleading teams and national cheerleading teams during 4 processes, in which we participated in the Cheerleading World Cup in the United States. I started as a cheerleader from third grade all the way through the Ulatina and UCR university processes. As a coach, I started in 2003 at the Liceo Laboratorio, 15 years as a coach at the Methodist College which has been within the first 3 places in recent years and Grand Champion in 2016.

In addition, in 2019 I was a coach of Juegos Nacionales representing the Montes de Oca committee obtaining First place.

I am an internationally certified trainer with courses from the ICU (International Cheerleading Union).

I have had the opportunity to attend International Cheerleading Championships and Camps.

I am very excited and happy to be a part of the Saint Gregory Family as a Sports Coordinator, Cheer Coach, and High School and Online Teacher. And thus achieve great sports and wellness projects since sport is a great benefit for our students at a sports level, but also spiritually, mentally, teamwork and dicipline development.


Susana Chacón

My name is Susana Chacón, I graduated in Spanish Philology from the UCR, I’ve been working at Saint Gregory for over 22 years since Mrs. Calderón opened the high school and invited me to be part of her project. There is nothing more than I enjoy than teaching and forming future generations. God has given me the privilege to guide them from seventh grade until they graduate. Being part of the Saint Gregory family has been a wonderful experience, that I could have never dreamed of.


Jacqueline Alvarado

My name is Jacqueline Alvarado. As part of my professional training, I have a Bachelor in Education with emphasis in the teaching of Social Studies and with a Degree in Educational Evaluation. In order to be up to date in the prevailing educational methodologies I have taken courses related to 21st Century Skills, PBL, Blending Learning, and Flipped Classroom among others. In addition, I am certified by ASOBITICO to teach the History course in the International Baccalaureate Program. Before becoming part of this great institution I have had the opportunity to work in other prestigious schools in the country.

I describe myself as an organized and dynamic person who likes challenges and enjoys the activities I am part of.


Luis Antonio Bedoya

I studied Philology at the University of Costa Rica and I have been dedicated to the education of teenagers for over 16 years. Since I am also a writer, in my class I seek to motivate the exercise of writing not only as a fundamental communication tool in our competitive society, but also as a valuable instrument of communication with ourselves. In addition, I am enthusiastic about the institutional initiative of joining the International Baccalaureate community, I have the expectation that reading will be appreciated from more attractive edges to students. My main goal for my classes is to read with pleasure and write with passion; Everything else, as always, is granted.


Yuliana Madrigal

My name is Yuliana Madrigal Araya. I obtained my degree as Bachelor in Teaching of Mathematics at the University of Costa Rica, I consider myself to be an organized, active, responsible and helpful person.

I have worked with teenagers for at least eight years in different public and private projects and this is my first year at Saint Gregory School. I enjoy to share knowledge with my students, to witness their learning and growth in my subject, in addition to fostering in them critical thinking and analytical skills.

French teacher

Carol Vindas

Hello, my name is Carol Vindas and I am 41 years old. I am Spanish – French fluent and I have a high intermediate English level. I graduated from the University of Costa Rica in French. Since I obtained my degree in 2002, I worked for the MEP program at the French-Spanish Bilingual Educational Centers. I was a homeroom teacher of one group and a Spanish teacher for the other one. I taught Science and Math in French as well the regular French class.

My experience also extends to the private field of education where I worked as a French teacher in elementary and high school at Mont Berkeley School and Saint Gregory School. I have also been a tutor for teenagers preparing to take their DELF exam in different levels.

This year, I have the wonderful opportunity to be part of Saint Gregory again, taking on new challenges and hoping to live great experiences.

I want to continue studying and learning, because in this beautiful mission of life that we teachers have, we must always grow and learn personally and professionally.


Alexander Araya

Ever since I was in elementary school I had a fascination with biology and marine life. I graduated from the first generation of the International Baccalaureate at Palmares Bilingual High School in 2010 and even did my extended essay in biology. Subsequently, in 2014, I graduated from the Marine Biology career at the National University and got a Master’s Degree in Marine and Coastal Sciences at the same university in 2018. I have worked as an editor for Revista de Ciencias Marinas y Costeras, fundraiser for Asociación Latin American Sea Turtles and marine sponge taxonomist for the University of Costa Rica. In addition, I have taught college and diploma level lessons in topics such as coral reef ecology, marine sponge taxonomy and ecology, oceanography, and marine and coastal ecosystems.


Jessica Varela Madrigal

My name is Jessica Varela Madrigal, I am 29 years old and I live in Curridabat. I have been a choreographer and dancer for approximately more than 12 years, I have been a dancer of hip hop, popular dance, and modern dances which have helped me develop my professional part in the field. I have participated in several Student Festivals (FEA) with different dance groups from Schools and Colleges nationwide, thus obtaining the first places in the last five years for the Student Arts Festivals in categories of National and International Folkloric Dances, I am currently a Costa Rican Inspirations dancer, with which the next February 2022 we will be traveling to Oman to represent our roots and customs, for me it is an honor to belong to this institution as an instructor not only of dance but also of values, idiosyncrasy, respect and love for our neighbors.

Physical Education Teacher

Adolfo Centeno

I’m a college graduate in Physical Education and federated soccer coach. I have been working at SGS for 5 years now as the PE teacher for Preschool and Elementary school. I am also the soccer and badminton coach.
I get along with all my students and love to transmit my knowledge to them when playing sports.
I have experience in the minor league soccer, national champion in the LINAFA Tournament, and I have my own soccer academy.


Adolfo Medina

Graduated from the Universidad Autonoma de Centroamerica, I have worked as a preschool teacher in the field of physical education and early stimulation for 6 years, I have more than 10 years of experience in education, where I have been able to work as a teacher of primary, and high school , however, I firmly believe that work at an early age significantly marks the integral development of the infant and the different approaches and methodologies applied in an affective and responsible way provide a tool for personal growth for both the teacher and the child.

IT Teacher

Kevin Quesada Arias

I have a degree in Systems Engineering from the UAM. I am currently finishing my Master’s thesis in Education with a specialization in ICTs in Education, UNINI México and Universidad Europea del Atlántico. I also have a degree in Theology and I am currently pursuing my Bachelor’s Degree in Bible-Theology at Global University. I also serve as general co-patron at the Casa de Misericordia y Restauración church in Cipreses de Curridabat and as a mentor of theological courses and deputy director at the Virtual Theological Seminary.
I have been working at Saint Gregory for more than 8 years, where I work as an I.T. teacher for 1st to 11th grade, Programming and Chess club as well as TISG teacher for IB. Additionally, I am in charge of the Technology department of the institution and the administration of Cloud Campus.

I am a musician, I have been playing bass for 10 years. I love reading. Among my favorite books are: The Bible, John Maxwell, J.R.R. Tolkien and Covey. I collect scout badges (I was a receiving member for 11 years) and I am currently a prosecutor for group 210 of the Guides and Scouts Association of Costa Rica.


Eddy Ulloa

Committed, cooperative, resourceful and goal-oriented professional. Graduated from the University of California, Los Angeles (UCLA) with a specialty in Language Arts and with an Emphasis in Linguistics and Spanish — Modern Languages ​​and Spanish and a specialty in TESOL — Teaching English to Speakers of Other Languages. Focused on results and with a great capacity for listening and continuous improvement. I have more than 12 years of experience in teaching English at the primary and secondary levels and homeroom teacher in prestigious schools. Fan of outdoor activities among other sports.


Yenori Edwards

I was born in Port Limon and the age of 17, I joined the OM Ships International, a non-denominational Christian organization dedicated to sharing knowledge, help, and hope around the world. During my time there, I was able to share the love of God, interact in different cultural settings, translate for and teach English to the Hispanic communities and crew members on the ship.

Two years later, I returned to Costa Rica and decided to study English Translation and English Teaching. Later I realized that my passion was to be in the classroom making a difference in the lives of students laughing, singing, teaching, and learning -I strongly believe teaching happens from the facilitator to the students and vice versa!

With over thirty-three years of experience teaching both in prestigious schools in Costa Rica and in the United States, my genuine love for languages, cultures, and teaching young people and adults have made me the professional I am today both as a high school English teacher and college professor.

I love singing, acting, laughing, going to the movies, and having long conversations with family and friends. I also enjoy driving on the highway at night and during holidays when there is little to no vehicle on the road. I believe that it is the perfect time to notice and admire the wonder of God’s creation and mercy towards mankind. In the world full of distractions, we tend to forget to stop and appreciate God’s love and presence in our lives.


Luis Armando Matamoros

Before telling you about my experience and professional training, I would like to mention that I am a human being focused on the fight for the formation of a more integral youth, I believe in students and that is why day by day my efforts are aimed at providing opportunities for them to develop their talents.

I am a teacher of Social Studies and Civic Education in the national system, besides being a teacher of History, CAS, Business Management in the International Baccalaureate Program in which I have six years of experience. Besides, I have a master’s degree in Educational Administration.

More than a degree, I have always focused on enhancing the skills of the students, that they enjoy the educational process, and that they understand the reality in which we live today, I always use the motto: “I don’t like quiet classrooms, because a quiet classroom is a sad classroom, and I don’t like sad spaces ”.


Natalia Díaz

Hello, my name is Natalia Díaz Soto, and I have been teaching English for 14 years. I studied at the UCR, and there I got my bachelor’s degree on teaching as well as my master’s degree on teaching English as a second language (teaching a group of people with disabilities). Then, I obtained my MT6 category which is on elementary school teaching. Finally, 2 years ago I got my postgraduate degree on Evaluation. I like to continue studying because I really like to be updated. Regarding my teaching experience, I have worked in private institutions mainly and at the UCR. In private institutions, I have taught children and teenagers, and I really like both populations, but I prefer challenging teenagers. Working at the UCR with adults is something that I really enjoy as well. This is my first year at SGS, so I am very happy and enthusiastic because I am working with your children, and that is an honor to me.

High School Assistant

Laura Arrieta