Koisamo Mixed Senior (formerly called Koisamo Mixed Secondary) is a C4 Public Mixed Senior School that is physically located in Nakuru County, Rongai Sub County  in the Rift Valley Region of the  Republic of Kenya. This article provides all the details about Koisamo Mixed Senior, including: the school’s cluster, level, UIC Code, Knec Code, Admissions and location.

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

Koisamo Mixed Senior School’s Basic Data and National Information.

School’s Old Name	Koisamo Mixed Secondary
School’s New Name	Koisamo Mixed Senior
Cluster	C4
Gender	Mixed
Accomodation Type	Day
Region	Rift Valley
County	Nakuru
Sub County	Rongai
UIC Code	XTXH
KNEC Code	27552071
Type of School	Public
Regular or SNE	Regular
Disability Type	None

Koisamo Mixed Senior 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 Koisamo Mixed Senior 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.

Koisamo Mixed Senior’s Background and History.

Koisamo Mixed Senior, historically known as Koisamo Mixed Secondary, has played a very key role in the Kenyan Education Sector and more particularly in Nakuru county; where it is domiciled.

The school has grown over the years and is now a fully recognized  C4 Public Senior School. In January 2026, Koisamo Mixed Senior admitted the first grade 10 learners under the CBE Curriculum.

Location of Koisamo Mixed Senior.

Koisamo Mixed Senior’s exact physical location is in Nakuru County, Rongai 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. Koisamo Mixed Senior, just like other Senior schools in the region, favourably compete in co-curricular activities, academics and Infrastructural development. Before joining  Koisamo Mixed Senior, confirm the pathways it offers.

Frequently Asked Questions About Koisamo Mixed Senior.

1. What is the UIC Code for Koisamo Mixed Senior?

The UIC Code for Koisamo Mixed Senior is XTXH.

2. Is Koisamo Mixed Senior a Boarding or Day School?

Koisamo Mixed Senior is a Day Senior School.

3. What CBE Grades are taught at Koisamo Mixed Senior?

Koisamo Mixed Senior offers CBE Senior Schools Grades at Grade 10, 11 and 12.

4. What is the Knec Code for Koisamo Mixed Senior?

The Official Knec Code for Koisamo Mixed Senior is 27552071.

5. In Which County is Koisamo Mixed Senior Found?

Koisamo Mixed Senior is located in Nakuru County.

6. Does Koisamo Mixed Senior admit Boys, Girls or Both?

Koisamo Mixed Senior is a Mixed Senior School.

7. What was Koisamo Mixed Senior’s Fomer Name under the 8-4-4 Education System?

Koisamo Mixed Senior was formerly called Koisamo Mixed Secondary.

8. What is Koisamo Mixed Senior’s New Cluster?

Koisamo Mixed Senior is now classified as a C4 Senior School.

9. Is there SNE Support for Learners at Koisamo Mixed Senior?

Koisamo Mixed Senior offers support for Regular learners. The school’s Disability Type is None.

10. Where is Koisamo Mixed Senior Located?

Koisamo Mixed Senior is found in Rongai Subcounty of Nakuru County; in the Rift Valley Region of the Republic of Kenya.

11. Is a Koisamo Mixed Senior Private or Public School?

Koisamo Mixed Senior 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.