What should be the language of instruction in lower primary?

Even before the switch from French to English as the language of instruction in schools, many Rwandans rushed to learn English a language that had clearly become the de-facto global language. In fact, many schools were running a dual English-French system. 
A primary school teacher uses English  during a science lesson. The New Times/ T. Kisambira.
A primary school teacher uses English during a science lesson. The New Times/ T. Kisambira.
Jean de la Croix Tabaro