In contrast to Hallinger's (2003) retrospective, which concludes that instructional leadership speaks to individual practice, work by Camburn, Rowan, and Taylor (2003) uses instructional leadership as a subconstruct in a study examining distributed leadership. Their study represents an example of a different and independent conceptualization of instructional leadership. These researchers seek to understand how shared leadership includes instructional leadership as a collective practice, not an individual practice. Camburn and colleagues investigate distributed leadership in schools using federally funded comprehensive school reform models. These researchers construct a survey that includes four instructional leadership subconstructs—setting instructional goals, developing instructional capacity, coordinating curriculum, and monitoring improvement— among multiple measures of shared leadership. They conclude that instructional leadership could be exhibited by more members of the professional community than just principals.