Public senior school

Masii Boys High School

Also listed as Masii Secondary School.

A senior school in Mwala sub-county, Machakos County. It offers STEM, Social Sciences and Arts & Sports Science, with 11 subject combinations.

School details admission facts are for the 2026 intake

Cluster: C2Ministry of Education senior-school cluster.
Gender: Boys
Boarding or day: Boarding
2026 fees: KSh 53,554 or 40,535 per year, depending on the approved tierGovernment-set schedule, not an individual school invoice.
Ownership: Public

Next placements

Not released yet for the January 2027 intake. Last year: 19 December 2025. KEMIS placement portal · Get an alert when they’re released.

KCSE results 2006–2010

Masii Boys High School scored a mean of 5.11 (C-) in KCSE 2010, close to that year’s national average of 5.15, up from 4.45 in 2009.

	2010	2009	2008	2007	2006
Mean	5.113	4.451	4.653	6.132	5.372
Grade	C-	D+	C-	C	C-
Candidates	160	182	150	136	148

KCSE results

Pathways and subject combinations checked 15 October 2026

STEM6 combinationsPure Sciences 3 · Applied Sciences 2 · Technical Studies 1

Pure Sciences · 3Agriculture, Biology, ChemistryST1042

Biology, Chemistry, Computer StudiesST1046

Biology, Chemistry, PhysicsST1048

Applied Sciences · 2Agriculture, Computer Studies, PhysicsST2067

Agriculture, General Science, Home ScienceST2088

Technical Studies · 1Electricity, Geography, PhysicsST3026

Social Sciences3 combinationsHumanities & Business Studies 3

Humanities & Business Studies · 3Business Studies, Christian Religious Education, Fasihi ya KiswahiliSS2109

Business Studies, Geography, History & CitizenshipSS2025

Business Studies, Geography, Literature in EnglishSS2061

Arts & Sports Science2 combinationsSports 2

Sports · 2General Science, Sports & Recreation, Theatre & FilmAS2038

Literature in English, Music & Dance, Sports & RecreationAS2047

Subjects in these combinations · 17

Agriculture, Biology, Business Studies, Chemistry, Christian Religious Education, Computer Studies, Electricity, Fasihi ya Kiswahili, General Science, Geography, History & Citizenship, Home Science, Literature in English, Music & Dance, Physics, Sports & Recreation, Theatre & Film

Senior schools in Machakos County offering STEM · Social Sciences · Arts & Sports Science

How subject selection works: what pathways, tracks and the codes mean

Codes and registration

KNEC code: 12314101
UIC: PLJ3
School code: H4050027
Level: Senior school
Sponsor: Religious Organisation
Student needs: Ordinary
Postal address: 7 MASII

Older records figures from the 2013 records; counts made in 2007

Students enrolled: 683
Teaching staff: 36
Students per teacher: 19.0
Acres: 30
Acreage per enrolment: 22.8

Staff counted in 2007 ›

Role	Men	Women	Total
TSC teachers	16	18	34
PTA and board teachers	2	0	2
Non-teaching staff	22	8	30

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Data sources

The school description and other details come from the 2013 school data. Classification and codes come from the 2026 senior-school register.

Register, pathways and fees

Ministry of Education Grade 10 selection portal (KEMIS) pathways, combinations, emblem · checked 15 October 2026
December 2025 senior-school list, row 337 classification and codes
June 2025 senior-school register, row 4819 checked 22 October 2026
Kenya Gazette Notice No. 1449 2026 fee schedule