The Social Policy Research Centre (SPRC) was contracted by headspace and the University of Melbourne (UoM) to conduct the first independent evaluation of headspace in early 2008. It is a longitudinal evaluation with two Waves of data collection (2008 and 2009). This interim report presents data from the first Wave (2008). Most of the Wave 1 data were collected between late July and September 2008, at a time when many of the Communities of Youth Services (CYSs) had only recently opened and the components were still developing resources and refining support. A brief overview of this document (Muir et al., forthcoming) has also been produced.