The thread of the human being runs through all, giving rise to the possibility of dialogue across Big Ideas. The Big Idea groupings allow teachers to work together with teachers from related subjects, albeit from different educational systems, while individually shaping the materials generated towards their own specific subject curriculum. It has been recognized from the outset that it is outside the scope of PACE to make changes in a school’s curriculum, but it can enable existing curricula to be delivered through the lens of a Big Idea using new methods of teaching.