The school admits bright students from financially challenged backgrounds which led to a shortfall of funds for development.

In June 2011, the school was hit by a storm that damaged the kitchen and dining hall, knocking out power supply for some time.

[5] In 1989 and 2007, Mang'u High School ranked first nationwide in the Kenya Certificate of Secondary Education[6] and led the country in the national exam.

The National Math Contest has gained fame as a competitive and challenging mathematics exam that prepares students for the Kenya Certificate of Secondary Education.

The school is highly selective, with only the top performing students in the Kenya Certificate of Primary Education offered admission.

In 2001, the students went on strike to protest the forced transfer of Principal Paul Agali Otula after he refused to admit the son of a government official.

The school applies an affirmative action policy to ensure marginalized students from hardship semi-arid areas are given a chance.

The Aviation students undertake most of their studies at Wilson Airport and Moi Air Force Base in Embakasi.

Some students have proceeded to join the Kenya Air Force while others have studied aeronautical engineering at American, British and Russian universities.

Possessing an athletic program over 50 years old, Mangu offers its students the opportunity to play in several sports and possesses teams that compete in basketball, soccer, handball, rugby, tennis, volleyball, and field hockey.Mang'u high provides a wide array of clubs to develop individual student interest and abilities.

The emblem traces the history of the Roman Catholic order of priests known as the Holy Ghost Fathers or Spiritans.