Program Staff


We are very proud of our teaching staff at Colorado International School. Please feel free to review their biographies.


alex  Alexandre Ayité

“Get that child involved in sports… all that energy needs to be properly channeled!” announced my father when I was just nine. By age 17, I was a black belt in Judo, a second-degree black belt in Kung Fu, and a leading scorer in the national Senegalese Handball team.

After moving to Paris, I studied French Boxing under Richard Sylla, Patrick Augais and Robert Paturel, and won the Silver Gloves for French Boxing. For twenty-five years in Paris, I worked as a bodyguard and as a personal fitness instructor, teaching self defense, French boxing, kickboxing and other fitness classes.

In 1997 I moved back to Dakar, Senegal, West Africa, where I trained the National Senegalese Police Guard and the National Senegalese Boxing Team.

I moved to Denver in the fall of 2001 where I work as a security guard, fitness and boxing instructor for children and adults, and part time P.E. teacher.  I am delighted to be working with the Colorado International School students, combining my love and mastery of the French language and thorough knowledge of sports with my amazing patience and wonderful rapport with children.

cos-0068  Monica Chavéz

My name is Monica Chavez Barreto O’Farrill. I come from Mexico City. I have participated in Education as a Bilingual Teacher and as Academic Coordination and Educational Consultant for more than 30 years. I have a BA in Sciences of Education and BA in Early Childhood Education by Secretaría de Educación Pública in México. I am certified by International Baccalaureate and have various educational diplomas endorsed by prestigious universities in Mexico and U S A. I have worked in international schools in the IB program in Mexico City and Oakland Ca, with an important approach to multiculturalism and educational differentiation. This multicultural experience has created in me the challenge of breaking paradigms in teaching and sharing tools to face education in the present. I come to CoIS as Spanish Teacher, PYP- IB Coordinator and Preschool Director with great excitement of being part of this wonderful multicultural community.

cos-0093  Kat Foley

My name is Kat Foley and I am the new English teacher for middle school. This year I will be teaching English, Science, History, and Social Studies to grades 4-8. I will also be working on organizing the after-school enrichment programs.

I am from Evergreen, Colorado and hold a Bachelors of Science in Mechanical Engineering from Rensselaer Polytechnic Institute in Troy, New York. After graduating, I joined the United States Peace Corp. For two years I taught Physics and Mathematics in the Port Loko Catholic Secondary School in Port Loko, Sierra Leone. I loved teaching in this challenging environment and getting to know my students. I also got the chance to do several development projects working with local partners in the school. After returning home I worked as an Adjunct Math Professor at Red Rocks Community College. From 2013 to 2015, I taught Science on-board the M.V. Africa Mercy, a hospital ship that delivers surgical relief to countries with poor medical infrastructure. With the ship I travelled to Canary Islands, Republic of Congo, South Africa, and Madagascar. I come to CoIS from Dakar, Senegal, where I spent the past year teaching at a boarding school. Returning home to Colorado, I was hoping to work in an international environment and am delighted to have found Colorado International School.

In the classroom, I make every effort to challenge my students to excel to the greatest of their abilities. As their teacher, my personal goal is to provide them the tools and encouragement with which they will be empowered to ask their own questions and to seek their own solutions. I will also expect my students to respect their school, the learning process, their teacher, their peers, and most of all, themselves.

Lu He   Lu He 普通话

My name is Lu He. I have over 10 years of teaching Mandarin Chinese experience in Colorado since I immigrated to U.S.A. in 1996.  I have been teaching PreK/K Mandarin at Joyous Chinese Cultural Center School and Chinese Great Wall Academy.

Currently, I am a Mandarin program Pre-K teacher at Colorado International School. I have been teaching Pre-K Mandarin Chinese, math, science and social studies since 2011. Because I had the benefit of growing up in China, my Mandarin is excellent.  I obtained a Bachelor’s degree in Economy from GuangXi University. I have certificates of completion from Colorado Chinese Teachers Consortium.I also completed my Early Child Education 101 and 103 classes at Community College Of Aurora in 2011.

Through my teaching experiences, I have developed my classroom management skills, and have found this to be an important asset.  I have utilized classroom management and differentiated instruction to help students learn successfully and enjoy the process, all the while maintaining a language immersion atmosphere, and cultural diversity.

I also maintain an IB curriculum that requires thematic educational activities that are both fun and creative. Because I understand the challenges of learning a foreign language, I use approaches that stimulate students’ interests in Chinese through culture, games, songs, drama, projects, homework, and other fun activities.

I really enjoy working intensely with kids to help them grow and develop. My goal is to prepare the children to be ready to start elementary education in Mandarin.  My teaching goal: Children progressively learn to express themselves in Mandarin as they are immersed in the target language all day by engaging in playful structured learning activities. Along with the other Pre-K/K teachers at CoIS, we focus on an IB thematic unit for a selected time, and the students learn Mandarin vocabulary relating to the IB theme.





cos-0045 Charlotte Jeauneau





cos-0095  Paul Manga

My name is Paul Manga. I am very excited to be coming back to Colorado International School. I have been previously at CoIS from March to May 2010 as a French Substitute Teacher. I am really happy to have another opportunity to contribute to the French Immersion Program here.

I was born in Casamance, a rustic but very beautiful green region, in the southern part of Senegal. My country is a former French Colony where French is the official language. I was immersed into French when I entered elementary school at 6 years, all the way to the end of my education.

After receiving my high school diploma, I had to pass an exam to enter the National School of Education, where I earned, after 3 years of training (education) and one year of internship, my BA in Education, with the specialty Preschool Teacher, in 1986. After my graduation, I was sent to Ziguinchor, capital of the region for 4 years to work as an assistant of the regional inspector of preschool education. In October 1990, I asked to leave the administrative work to go back to teach in Pk-K to earlier elementary students for 13 years, which is my real passion.

I have taught, like most of my colleagues in plethoric classrooms of 45 to 52 students, in multicultural and multilanguage areas. As you could see, my passion for teaching, especially for Early Childhood Education, allowed me to manage theses big groups to succeed in school in French immersion context – French wasn’t their native language – for thirteen years in my country. At Colorado International School I am getting basically the same context, but here the length of student groups make easier to work.

My experience as a teacher here started from 2006 to now. I have been teaching French for adults periodically at Bridge Linguatec since 2006 to now and at Lutheran High School at parker (grades 9-12), from 2007 to 2010. I am getting here with a clear vision of those better possibilities given to me for best results.

Je m’appelle Paul Manga. Je suis très ravi d’être de retour à Colorado International School. J’ai déjà été à CoIS de Mars à Mai 2010, comme un enseignant suppléant de français. Je suis vraiment heureux d’avoir une autre occasion de contribuer au programme d’immersion en français ici.

Je suis né en Casamance, une région rustique, mais très belle et verte, dans la partie sud du Sénégal. Mon pays est une ancienne colonie française où le français est la langue officielle. J’ai été immergé en français quand je suis entré  à l’école élémentaire à 6 ans et, ce, tout au long de mon cursus scolaire.

Après avoir reçu mon diplôme d’études secondaires, j’ai dû passer un concours pour entrer à l’École Nationale de Formation des Enseignants, où j’ai obtenu en 1986, après 3 années de formation et une année de stage en responsabilité entière, mon baccalauréat en éducation, option Education Préscolaire. Après mon Certificat d’aptitude à l’Education Préscolaire, j’ai été affecté, pour quatre ans, à Ziguinchor, capitale de la région, comme assistant de l’inspecteur régional de l’Education Préscolaire. En Octobre 1990, j’ai demandé à quitter le travail administratif pour revenir enseigner dans les écoles au niveau préscolaire et  dans le cycle préparatoire de l’élémentaire pendant 13 ans. En quittant les bureaux administratifs je retrouvais ainsi ma vraie passion, l’enseignement.

J’ai enseigné, comme la plupart de mes collègues dans des classes pléthoriques, allant de 45 à 52 élèves, dans les zones multiculturelles et multilingues. Comme vous pouvez le constater, ma passion pour l’enseignement, en particulier pour l’éducation de la petite enfance, m’a permis de réussir à gérer les grands groupes. C’est dans un tel contexte d’immersion en français – le français n’était pas la langue maternelle des enfants – que j’ai réussi à former pendant treize ans des générations d’enfants dans mon pays. A Colorado International School, je retrouve  essentiellement le même contexte, à l’exception qu’ici les effectifs sont loin d’être pléthoriques et les conditions de travail meilleures. J’ai réellement la ferme conviction que je ferai plus de résultats dans une école comme CoIS où  les conditions matérielles et l’environnement offrent de meilleurs avantages.

Mon expérience, comme enseignant ici, date environ depuis 2006, ou je donne périodiquement des cours de Français pour adultes à Bridge Linguatec jusqu’à présent, et au Lycée Luthérien de Parker ou j’ai servi de 2007 à 2010. J’arrive donc dans cette école avec une claire conscience des possibilités qui me sont offertes pour faire des résultats convenables.

cos-0133  Birgit Mann

My name is Birgit Mann and I am the Pre-K teacher for Colorado International School. I was born and grew up in a small town in the Thuringian Forest in Germany. In 2011 I moved to Denver where I have been living with my family. I have a Bachelor‘s degree in Biology and Chemistry which I obtained in 1982. For many years I taught middle and highschool students.  Before I moved to the United States I trained early childhood teachers.  My passion is teaching.

I also enjoy working with people from other cultures. Colorado International School is giving me the opportunity to do all this.

Mein Name ist Birgit Mann. Ich unterrichte an der CoIS die 3- 5 Jaehrigen. Seit 2011 lebe ich mit meiner Familie in Denver. Geboren und aufgewachsen bin ich in einer kleinen Stadt in Thueringen, Deutschland. Als Diplomlehrer fuer Biologie und Chemie unterrichtete in den letzten 28 Jahren verschiedene Faecher und  Klassenstufen.  Bevor ich nach Denver kam, unterrichtet ich an einer Fachschule, welche Erzieher und medizinische Berufe ausbildete. Um mit den Juengsten hier zu arbeiten zu koennen, belegte ich zwei Klassen fuer Fruehkindliche Bildung am College.

cos-0098  Antje Radtke

My name is Antje Radtke and I’m the teacher of the German program in Middle school. I was born in Duisburg, a city in the western part of Germany. In 2013 me and my family moved to beautiful Colorado. My two daughters are in College and my son is a sophomore in Highschool.

I have a Master’s degree for Primary Education in German, mathematics and PE and I also have a certificate for teaching Englisch as a Second Language. I worked as a classroom teacher for 15 years. In 2009 I started to work for the the ZfsL in  Essen where I was responsible for the practical training of student teachers  in English. I also served as a member of the examination board for Second State Exams and as a teacher trainer for the Department of Education in Düsseldorf.

I believe that languages are learned through communication and authentic situations. I’m very excited to work at Colorado International school where language learning is connected with international experiences. At Colorado International School I’m responsible for the German Middle School program and I coordinates, organizes and facilitates in-services, workshops  teacher trainings and the IB Program.

Mein Name ist Antje Radtke und ich werde an dieser Schule das Fach Deutsch in der Mittelschule unterrichten. Ich bin in Duisburg im westlichen Ruhrgebiet geboren und wir sind 2013 mit der ganzen Familie nach Colorado gezogen. Ich habe zwei Töchter, die die Universität besuchen und einen Sohn in der 10. Klasse an der „Highschool“ in Highlands Ranch.

Meine Unterrichtsfächer sind Deutsch, Mathematik und Sport, die ich mit dem 2. Staatsexamen abgeschlossen habe. Zusätzlich habe ich die Lehrerlaubnis für das Fach ESL (English as a Second Language). Seit 2009 bin ich in der Lehreraus- und fortbildung tätig und habe für die Bezirksregierung Düsseldorf 2. Staatsprüfungen durchgeführt.

Ich habe viele Jahre das Fach Englisch in der Grundschule unterrichtet und glaube, dass man eine Sprache nur durch Kommunikation und authentische Situationen lernen kann. Daher freue ich mich sehr, dass ich die Gelegenheit bekomme an der Colorado International School zu unterrichten, die diese Gelegenheit für alle Kinder und Sprachen bietet. An der Colorado International School leite ich das Deutsche Programm für die Middle School und bin verantwortlich für die Lehrerfortbildung und das IB Programm.

Song, Xiaoying  Xiaoying Song – 普通话

My name is Xiaoying Song. I was born in Beijing, China, and graduated from Nanjing University of the Arts with a BA in Fine Arts. After that, I worked in an advertising agency for a couple of years before I moved to Norway to continue my education as a graphic artist.

I moved to Colorado in 1997. I taught art classes for all different age groups at BoHua Chinese School from 2000 to 2011. I also completed a teacher training course in Beijing and have a certificate of recognition as a Chinese teacher from the International Association of Chinese Language Teachers.

I enjoy working with children and am passionate about sharing my knowledge and culture with them. When teaching, I like to develop a creative and lively environment in which students can achieve their academic goals. I’m very excited to be part of the team at CoIS!





Carmen Stagg

Hello! I come to Colorado International School after ten years of working in both formal and supplemental education. I hold a Master of Arts in Experiential Education from Prescott College with a specific focus on integrated curriculum design. I am an active member of the Association for Experiential Education and I strive to utilize an experiential and student-centered approach in everything I teach. I also have two Bachelor of Arts degrees from Virginia Commonwealth University, where I studied the impact of politics, religion and culture on international systems. During and after my undergraduate studies I traveled extensively, to Peru, Guatemala, Mexico, Belize, Thailand, and all over the United States.

My experience in the field of education ranges from being a preschool teacher to working with college students. Most recently I have had the fortune of working with youth in and out of the classroom in beautiful Colorado. I love igniting a love for learning in youth, particularly through active and interactive learning experiences. I spent the past four years as the Youth Education Program Manager for the Colorado Mountain Club, where I created, managed and taught elementary age programming that combines science, recreation, math, geography and history. I am passionate about integrated curriculum and the idea that ‘anything is the gateway to everything.’ I believe student inquiry creates connections that build wonder, intrigue, compassion, and the desire to know more. My favorite subject to teach is science and my favorite thing to do is be outside. I also have a six year old son who helps me on my learning and teaching journey every day.