School principals also evaluated very positively the collaboration dynamics that the project sparked among teachers. Around 75% of principals in intervention schools estimated that the project led to collaboration between teachers in unusual and positive ways, and that the project provided professional development opportunities that their teaching staff would not have had otherwise (see Chapter 6 for more details on teacher and principal reports). While the objective was mainly to trial and test the instruments and evaluation protocol, the pilot data collection also provided interesting insights as students' answers were actually collected.