The purpose of this study was to create and validate the Communication Function Classification System (CFCS) for children with cerebral palsy (CP), for use by a wide variety of individuals who are interested in CP. In this August podcast, Dr Peter Baxter speaks to Professor Mary Jo Cooley Heidecker (Assistant Professor, Department of Speech–Language Pathology, University of Central Arkansas, Conway, AR, USA) and Professor Peter Rosenabum (Professor of Paediatrics, McMaster University, Hamilton, Ontario, Canada), who were co-authors of the paper ‘Developing and validating the Communication Function Classification System for individuals with cerebral palsy’ by Mary Jo Cooley Hidecker, Nigel Paneth, Peter L Rosenbaum, Raymond D Kent, Janet Lillie, John B Eulenberg, Ken Chester, Jr, Brenda Johnson, Lauren Michalsen, Morgan Evatt, Kara Taylor. Read the paper: http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8749.2011.03996.x/abstract Read the commentary: http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8749.2011.04035.x/abstract