Meet the Secondary School Teachers

Mary M. Powell

Secondary School Coordinator & Social Studies Teacher
BA in History and Linguist, Grinnell College
TEFL Certificate
M.Ed. in Global Studies in Education, University of Illinois

I joined ISKR in early 2012 after having lived in Rwanda for 4 years, first as a teacher at the Maranyundo School for Girls, then as the Lead Instructor at the Akilah Institute for Women. Before coming to Rwanda in 2008, I taught at the Paraclete Academy in South Boston and was a Program Coordinator for a Hurricane Katrina rebuilding project in New Orleans. I hold a BA in History from Grinnell College, which is located in my home state of Iowa. In my spare time I volunteer for Every Child is My Child, a small non-profit which partners with local primary schools in Rwanda and Burundi to provide free secondary education for every one of their graduates.

Joseph Kutanwa

Mathematics Teacher
Bachelor of Science – Makerere University, Kampala, Uganda

I am originally from Uganda and have over 10 years of teaching experience. I am currently teaching AP math and have previously taught IB Higher level and Standard Level mathematics among other high school courses. I hold a Bachelor’s Degree of Science from Makerere University, Kampala, Uganda.


Bronwyn S. Wyngaard

Social Studies & English Teacher
BA (Hons) Social Anthropology – University of the Witwatersrand
Teaching Certification – SA Teachers

I’m from Cape Town and I’m here with my husband, Raymond, and two children, Fernandez and Padraic. I’ve been privileged to teach in a number of international schools in various countries including Lesotho, Botswana,Taiwan, Saudi Arabia, Kenya, Gabon and Malawi. I obtained my degree in Social Anthropology, with a second major in English Literature, at the University of the Witwatersrand in Johannesburg; and my certification from SA Teachers in Cape Town. I have a great love for the performing arts.  I also love being out in the natural environment and look forward to exploring beautiful Rwanda.

Dube Nkululeko

Mathematics & Science Teacher
Bachelor of Education in Math and Science (Honours)
M.ed. University of Free State, South Africa

I am a Zimbabwean national who joined ISKR in August 2011. At ISK, I have taught Middle School Science, and High School Math Science. Prior to coming to ISK, I have worked in proprietary and international schools in the Middle East and across Africa. Over the years, I have sponsored field trips, science fairs, and online educational games, as well as after school activities such as swimming, tennis, board games and soccer.

Kersti Lwambo

Science Teacher & Service Learning Coordinator 
Bachelor of Science in Biology – Manchester Metropolitan University Post Graduate Certificate of Education in Science specializing in Biology
Master’s in International Development and Education (in progress)

 I am originally from England, I first came to Rwanda in 2006 as a VSO volunteer working at a Rwandan working in a secondary school in Muhura, Northern Rwanda. In 2009 I was part of the wonderful team of teachers and parents who set up ISKR; it was a wonderful experience. After a break from teaching to have my daughter, I have been teaching in the UK at ACS International School just outside of London. Beyond teaching I love traveling with my daughter, visiting friends and family around the world.         

Tara Thirtyacre

English Teacher
BA in English Literature – University of California at Berkeley
MA in English Literature – University of California at Berkeley

I did my undergraduate and graduate work in English Literature at UC Berkeley, where I also taught as a Visiting Lecturer. After teaching at the college level for many years, I decided that I wanted to work more closely and more substantively with smaller groups of international students. I love my job as an international teacher, and over the last fifteen years I have lived and taught in Italy, India, Colombia, Zambia and South Africa. I am an avid hiker and have walked my way across both Spain and France. As all English teachers do, I enjoy reading, writing and the theater.