Clore Social Fellows Ruth Marvel and Owen Jarvis have published research proposing that large charities and housing organisations can develop social innovation and improve their effectiveness by working to "scale up" the innovations of smaller organisations and individuals . However, for many organisations this would mean putting aside the image of themselves as innovators and changing the way they think, collaborate and organise themselves. The report sets out the challenges and opportunities of scale for large organisations, and provides a set of case studies of organisations already doing it. It also contains a toolkit for those organisations who want to explore it further.