Toby and Ed discuss the positive and negative impacts that the balance of characters can have on the 'learning energy' of a cohort or class of children. They also considered the relative merits of investing more time in this rather than leaving it to chance, reflecting on 'high-performing' project teams in multi-national organisations. The was some blues at the end and a brief consideration of how different (or similar) the classroom would have been seventy years ago in 1952. A period of time of significance this weekend, apparently!