The Groupe Scolaire Officiel de Butare (GSOB) Indatwa n’inkesha, also known as the Indatwa n'Inkesha School and originally the Groupe Scolaire d'Astrida, is a secondary school in Huye district, It is regarded as one of the most prestigious and successful public schools in Rwanda. It was established in 1929 by the Brothers of Charity to educate Rwandans to assist the Belgian colonial administration. It is one of the oldest secondary schools in Rwanda.
This school is known for its academic excellence in both Ordinary level leaving National examinations and Advanced level leaving examinations. It is regarded as one of the most selective schools in Rwanda.
In 2004 President of Rwanda Paul Kagame visited the school to celebrate its 75th anniversary and thanked the Brothers of Charity. In 2012 the school celebrated its 83rd anniversary.