Complex sentence: In the state school system, about half of the material taught is religious, while readings devoted to covering the history, literature, and cultures of the non-Muslim world over twelve years of primary and secondary schooling come to a total of about 40 pages.
Split into simpler sentences: In the state school system, about half of the material taught is religious. In contrast, assigned readings devoted to covering the history, literature, and cultures of the non-Muslim world over twelve years of primary and secondary schooling come to a total of about 40 pages.