Ansarul Islamic Boys Secondary School also known as"A School," is a government sponsored public secondary school located in Tankoro Chiefdom, Koidutown, Kono District, Sierra Leone. The school was founded on Islamic Principle in 1974 by two illustrious Fula businessmen, Alhaji Sajalieu Bah, and Alhaji Chewtor Jalloh. The school is an affiliate of the Sierra Leone Ansarul Islamic Mission. The school's motto is "Service To Mankind." The school is the first and only boys secondary school in Koidutown. The school is regarded as one of the most prominent Secondary schools in the region. The school's alumni includes medical doctors, theologists, diplomats, politicians, paramount chief, military officers, lawyers, educators, athletes, and business entrepreneurs. Although the school has an Islamic tradition, students from all religious background are accepted, and the staff is made up of teachers from different religious background.
Class rooms, principal's office, Library and Mosque: