“…The personality dispositions of thick teacher-leaders (such as political sensitivity) play crucial roles as supportive grids for the performance of the relevant teacher leadership mandates. One of such mandates is the teacher leaders' role as reform champions or change agents (Von Esch, 2018) who work within the school system (Cooper et al, 2016) and from without the school system (Jacobs, Beck, & Crowell, 2014) to bring about beneficial improvement in the education system. As reform champions and change agents, teacher-leaders play a multiplicity of roles as mentors (Clarke, Killeavy, & Ferris, 2015), servant leaders (Nichols, 2011), team players (Koeslag-Kreunen, Van der Klink, Van den Bossche, & Gijselaers, 2018), team leaders (Honingh & van Genugten, 2017), curriculum reformers (Zhang & Henderson, 2018), and student character builders (Ningsih & Wijayanti, 2018).…”