Numerous nations implement Student Perception Surveys (SPS) in their schools to assess teaching for student learning improvement. However, research suggests no significant change in teachers' practices following such student voice-based assessment initiatives, noting their struggle to act upon it. Utilizing the "pyramid of student voice" as a key framework, we investigate how a Participatory Action Research (PAR)-based professional development (PD) shapes a group of Australian secondary teachers' interaction with SPS and professional learning. Analyses of the teachers' interviews, research projects, and reflective notes about their use of SPS illustrate how the PAR-based PD informed their practice, specifically: (i) transforming 'survey fatigue' to increased student voice; (ii) contemplating personal, professional, and political entanglements; and (iii) (re)building teacher agency--employing SPS as collective learning tools of professional empowerment rather than accountability measures of teaching. Implications include pathways to strengthen teachers' agency--honoring their professionalism--in assessment spaces increasingly shaped by student voices.