St. Catherine Girls High School Machakos offers the 8 - 4 - 4 system of education which is the Kenya National Curriculum. It consists of 13 (thirteen) subjects; they are listed below :-

English, Kiswahili, Mathematics, Biology, Chemistry, Physics, Geography, History, Agriculture, Christian Religious Education, Business Education, French, Computer Studies.

The curriculum gives students a wide range of options in selecting subjects that will shape their future.

Teaching Staff
The school boasts of dedicated graduate teachers, who have set goals as performance of each student is concerned. Each student is assigned to a teacher who closely monitors their performance, and is always at hand to provide guidance.

Support Staff
The girls are attended to by disciplined support staff to ensure that they are kept comfortable as they acquire knowledge. The school compound is well kempt and meals are prepared by a resident cook who ensures the girls are fed on a tasty balanced diet. 

Round the clock security is provided at the institution.

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