Thomas Fish Senior School (formerly called Thomas Fish Secondary School) is a C3 Public Mixed Senior School that is physically located in Kajiado County, Mashuru Sub County  in the Rift Valley Region of the  Republic of Kenya. This article provides all the details about Thomas Fish Senior School, including: the school’s cluster, level, UIC Code, Knec Code, Admissions and location.

This Boarding Senior School forms part of the Kajiado Education Network and has fully transitioned to a Senior School that offers Competency Based Education (CBE) Curriculum to Grade 10, 11 and 12 Learners.

Thomas Fish Senior School School’s Basic Data and National Information.

School’s Old Name	Thomas Fish Secondary School
School’s New Name	Thomas Fish Senior School
Cluster	C3
Gender	Mixed
Accomodation Type	Boarding
Region	Rift Valley
County	Kajiado
Sub County	Mashuru
UIC Code	NB88
KNEC Code	31566206
Type of School	Public
Regular or SNE	Regular
Disability Type	None

Thomas Fish Senior School operates as a fully Senior School offering the Competency Based Education (CBE/CBC) Curriculum. Students transition to this school from Junior School after sitting for the Kenya Junior School Education Assessment (KJSEA); which is a national assessment for Grade 9 learners under the Competency-Based Curriculum (CBC/ CBE). It assesses students in nine learning areas to evaluate their readiness to transition into Senior School.

Students who join Thomas Fish Senior School at grade 10 specialize in any one of the following three main CBE pathways:

1. STEM (Science, Technology, Engineering, and Mathematics): Focuses on innovators and problem-solvers. It branches into Pure Sciences, Applied Sciences, and Technical Studies, leading to careers like medicine, engineering, and IT. 
2. Social Sciences: Designed for communicators and leaders. It includes tracks in Languages, Literature, Humanities, and Business Studies, preparing students for fields like law, journalism, and education. 
3. Arts & Sports Science: For creative minds and athletes. It features tracks in Visual Arts, Performing Arts, Music, and various sports disciplines, fostering careers in the creative and sports industries.

Thomas Fish Senior School’s Background and History.

Thomas Fish Senior School, historically known as Thomas Fish Secondary School, has played a very key role in the Kenyan Education Sector and more particularly in Kajiado county; where it is domiciled.

The school has grown over the years and is now a fully recognized  C3 Public Senior School. In January 2026, Thomas Fish Senior School admitted the first grade 10 learners under the CBE Curriculum.

Location of Thomas Fish Senior School.

Thomas Fish Senior School’s exact physical location is in Kajiado County, Mashuru in the Rift Valley Region of the  Republic of Kenya.

What to know about Rift Valley Region’s Senior Schools.

Rift Valley is the home of some of the best and highly competitive Senior Schools in Kenya. Thomas Fish Senior School, just like other Senior schools in the region, favourably compete in co-curricular activities, academics and Infrastructural development. Before joining  Thomas Fish Senior School, confirm the pathways it offers.

Frequently Asked Questions About Thomas Fish Senior School.

1. What is the UIC Code for Thomas Fish Senior School?

The UIC Code for Thomas Fish Senior School is NB88.

2. Is Thomas Fish Senior School a Boarding or Day School?

Thomas Fish Senior School is a Boarding Senior School.

3. What CBE Grades are taught at Thomas Fish Senior School?

Thomas Fish Senior School offers CBE Senior Schools Grades at Grade 10, 11 and 12.

4. What is the Knec Code for Thomas Fish Senior School?

The Official Knec Code for Thomas Fish Senior School is 31566206.

5. In Which County is Thomas Fish Senior School Found?

Thomas Fish Senior School is located in Kajiado County.

6. Does Thomas Fish Senior School admit Boys, Girls or Both?

Thomas Fish Senior School is a Mixed Senior School.

7. What was Thomas Fish Senior School’s Fomer Name under the 8-4-4 Education System?

Thomas Fish Senior School was formerly called Thomas Fish Secondary School.

8. What is Thomas Fish Senior School’s New Cluster?

Thomas Fish Senior School is now classified as a C3 Senior School.

9. Is there SNE Support for Learners at Thomas Fish Senior School?

Thomas Fish Senior School offers support for Regular learners. The school’s Disability Type is None.

10. Where is Thomas Fish Senior School Located?

Thomas Fish Senior School is found in Mashuru Subcounty of Kajiado County; in the Rift Valley Region of the Republic of Kenya.

11. Is a Thomas Fish Senior School Private or Public School?

Thomas Fish Senior School is a Public School.

12. What CBE Pathways are offered at Senior School?

Senior schools offere 3 pathways; STEM, Social Sciences and Arts and Sports.