More precisely, the participation of Kuwait in TIMSS and PIRLS 2011 assessments showed very poor results in Mathematics and Sciences, and the lowest results in reading (http://timssandpirls.bc.edu/). Consequently, at stake in the educational reform envisaged by the state of Kuwait is growing competitiveness of human resources in a peaceful and global world. In such a context, taking decisions concerning the philosophy, structure, and finally the proper content of the subject curricula is a challenging endeavour facing many dilemmas and even contradictions. In this paper, we launch the debate concerning one of these dilemmas with a major impact in curriculum development, namely integration versus separation of knowledge learned in school.