This study investigates Hong Kong primary science teachers' understandings of inquiry learning, perceived difficulties in implementing inquiry learning, as well as their current practices of and resistance to using online resources, in order to identify their needs and propose suggestions to address these needs. An online survey has been used to collect data from the primary science teachers taking part in a professional development course. Simple descriptive analyses of the data show that although the teachers' conceptions of inquiry learning seem to match well with the idea of inquiry learning in general, their misconceptions and high level of perceived difficulties in implementing inquiry learning warrant our attention. As for teachers' use of online resources, it is found that traditional Web 1.0 resources are more commonly used, and when these online resources are used, teachers take the more dominant role in using them to support lecturing and explaining. Moreover, some associations between inquiry practices and use of online resources are observed. Accordingly, ways to overcome challenges in implementing inquiry learning and using online resources for the teaching and learning of science are discussed.[Copyright of Education 3-13 is the property of Routledge. Full article may be available at the publisher's website: http://dx.doi.org/10.1080/03004279.2012.710640]