Nkoaranga is a Co Educational, Boarding & Day Secondary School serving levels from form one to four. It was established in 03.03.1987 by Evangelical Lutheran Church of Tanzania Diocese (ELCT) of Meru with an aim of forming a living community with the highest caliber of staff that exist to help every member of society to make the most of their ability in a simulating and sympathetic environment and to prepare every individual to become a responsible member of a society. Nkoaranga was opened as a secondary school in 1987. Since its opening, it has been growing tremendously and numerous extensions and building projects have been carried out to bring it up to present size, now the school is receiving applications from various places in Tanzania. The staff members are very enthusiastic, dedicated and work extremely well together as a team. They create a very happy atmosphere in the school where good behavior is expected at all times from all its members.