Orthography is considered to be a major problem in Dutch education, since many pupils don’t seem to be able to master orthographic rules, even after years of education. In educational literature it is argued that the problems related to spelling are caused by approaches that focus more on rules of thumb than on linguistic insights. This is somewhat remarkable, since a good understanding of the Dutch orthographic system requires a fair amount of morphological knowledge. In order to effectively implement this knowledge, the development of a morphological awareness (MA) seems to be required. Therefore, a short intervention was designed for the upper levels of secondary schools (4 havo) which aimed to foster MA and, subsequently, improve orthographic skills. Results of this quasi-experimental study indicate that a short intervention can significantly boost MA, but that students don’t seem to be able to use MA effectively to enhance spelling performance.