Britain’s development assistance to Rwanda is regarded by both sides as a successful case and is set as a model of international aid. The Department for International Development of UK described the Rwanda scheme as a “model”，an “attempt” and an “innovation”，which has “pioneering” and “ground-breaking” significance. UK has changed the way of assistance from project aid to budget support，which is a “transformational prototype”. The most symbolic effect of British development assistance to Rwanda is that Rwanda joined the Commonwealth in 2009. The Rwandan government also added English as the main official language. In the basic education curriculum system，both English and Kinyarwanda are used as the basic teaching languages of primary and secondary schools. English gradually replaced French as the common teaching language in Rwanda. This has expanded Britain’s influence on Africa from traditional Commonwealth countries to other African countries.