Abstract
This paper reports on an attempt to measure aspects of pre-service teachers' understanding of middle school mathematics together with their perceptions of its difficulties by using a simple questionnaire. Pre-service primary teachers did not, in general, perform as well as their secondary counterparts, and they rated the items as more difficult. While there were differences between perceptions of conceptual difficulty and computational difficulty, it is not certain that these distinctions are clear in the minds of pre-service teachers. Suggestions for improving the questionnaire are discussed.