Reginah N. Mainka

Director - Thorn Tree School

From Director's Office

l am delighted to welcome you all to our school website, a window into the vibrant world of education at Thorn Tree School. As the director of this esteemed institution, it gives me great pleasure to share a few words with you. At Thorn Tree School, our mission is to prepare our learners to face challenges and embrace opportunities with Confidence. This ensures that our students are ready for the dynamic and interconnected world they will inherit. We believe in fostering an environment where every student is nurtured, challenged, and inspired to reach their full potential. Our dedicated faculty members are committed to providing a holistic education that goes beyond academics, emphasizing character development, critical thinking, and creativity.
In today's rapidly changing world, we understand the importance of equipping our learners with the skills they need to thrive in the 21st century. Our state-of-the-art facilities and resources provide students with the tools they need to explore, experiment, and collaborate. We have a reputation of providing an environment where all learners are able to thrive academically, socially, emotionally, physically and spiritually, where students are encouraged to be wholesome, confident and ambitious. We are all about growth to success.

I invite you to explore our website, where you will find a wealth of information about our academic programs, extra-curricular activities, and the achievements of our learners and staff. Whether you are a prospective student, a current member of our school community, or an interested visitor, I hope you will find our website engaging, informative, and inspiring.

Academic Awards
Teaching Staff
Support Staff
School Buses

What makes us special

Our Vision, Mission, and Core values are the bedrock of our school, providing a clear direction and purpose. The Vision establishes a standard of excellence, guiding our commitment to quality education. Our Mission encapsulates the overarching goal of preparing students for the challenges and opportunities of the world. The core values—Excellence, Integrity, Inclusivity, Engagement, and Lifelong Learning—cultivate a positive culture, shaping character and fostering a sense of community. Together, they create a cohesive framework that not only defines our identity but also inspires a dynamic and enriching educational experience, ensuring our school is a nurturing environment for both academic and personal growth.

Our Vision

To be Centre of Excellence for provision of quality and relevant education

Our Mission

To prepare young adults to face the world’s challenges with confidence.

Core Values

Excellence, Integrity, Inclusivity, Engagement and Lifelong Learning

Our Rich History

It was the dream of the-Late Madam Margaret Kashonga to start a school that will offer quality education to the growing community of Ongata Rongai township by then. The dream came to be true in the year 1993, when she started Thorn Tree School with only one learner by the name Kerry Otundo.

From its humble beginning, the school has realized tremendous growth throughout the years with the number of pupils increasing each academic year. As she took these tentative steps, she probably had no idea that her humble efforts would eventually be richly rewarded. They would birth one of the largest and most successful private schools in Kajiado County and the Rift Valley region. It is a school that currently boasts of a roll of hundreds of learners, a fleet of transport buses, storied buildings and dozens of teaching and non-teaching staff members.

In 2013, Thorn Tree School produced two pupils in the TOP- TEN LIST for the Kenya Certificate of Primary Education (KCPE) in the whole country and also emerged the top in Kajiado County till to date.

Our State-of-the-Art Facilities

Our school is well equipped with modern facilities, featuring state-of-the-art classrooms, science and computer labs, a library, sports fields, dining hall and more.
Our school is designed to provide a conducive learning environment with facilities that support academic excellence, physical well-being, and overall student development.


Computer Laboratories

Our school has two Computer labs equipped with windows Computers that are fast and well maintained. The computers are connected with high speed internet for learners.

Science Lab

As CBC curriculum demands for Junior School, Thorn Tree School has a modern Science Laboratory that is full equipped with learning apparatus and flowing water.

Play Ground

Our School playground is spacious, with vibrant play equipment, promoting active play and fostering a dynamic and enjoyable recreational and fitness space


The school library has been equipped with the recommended learning material as stipulated in the orange by the ministry of education.

Dining Hall

The school Dining hall has been equipped with gas cooking system and boilers with a capacity of 800 people when seated.


This is a special room set aside for the sick learners to recuperate after getting first-aid or treatment from the hospital.

Our Stellar Achievements

For the years that we have been in operation, we have attained several accreditation in different areas of excellence


Several Recognition of outstanding academic achievements from Ministry of Education Kajiado County


Participation in the Primary Schools Kiwi Collect for Progress Competitions


Several Certificates of Participation to County Ball Games Tournaments in different disciplines


Certificates of appreciation from different Societies for philanthropy programs and donations


Membership Certificate from Kenya Private schools Association Since 2011


Membership Certificate of Kenya Scouts Association

Our Academia Partners

Below are our partners in different areas who have enabled us to attain greatness in the academic field

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