The Teacher Mindset Survey instrument consists of a battery of items in the form of statements that the respondents affirm using a rating scale. These statements were formulated to map with the individual's mindset shifts about the Lenses in the Teaching As Collective Leadership (TACL) framework. These Lenses are conceptually defined as how teachers “see” their students, themselves, their communities, and their challenges in ways that are different from conventional perspectives that affect how a teacher views the purpose of their work and affects how they approach their work to develop collective leadership.