The Netherlands currently has 43 Islamic primary schools. Each is fully subsidised by the government. Yet since the first school was established in 1988 Islamic schools have been confronted with obstacles by the Ministry of Education, bad press and increasingly strict state supervision. Under pressure to improve their image, since 2008 Dutch Islamic primary schools have turned their attention away from expanding their numbers and instead focussed on improving school quality. In this article we describe the various developments and draw upon large scale empirical research to demonstrate the present state of affairs both in terms of cognitive and non-cognitive pupil achievements. We argue that the present results offer reasons to be cautiously optimistic.