In the years since 2007 the role of standardized testing in Irish primary (elementary schools has become increasingly prominent. All schools are now required to administer tests in English reading and mathematics in 2nd, 4th and 6th grades, and to report aggregated results to their Boards of Management and the Department of Education and Skills (DES). Schools are also required to share the results with parents/guardians at the three mandatory testing points and to do this in written format using end-of-year school reports DES, 2011. As of September 2017, the results are used at national level as part of the process involved in determining the allocation of special educational teaching resources to schools DES, 2017. The research described in this paper represents a collaboration between the Centre for Assessment Research, Policy and Practice in Education (CARPE) based at Dublin City University and the Irish National Teachers’ Organisation (INTO) - the largest teachers' trade union in Ireland representing 95%+ of all teachers at the elementary level. In examining elementary teachers use of and attitudes to standardized tests at a time when the stakes associated with this form of assessment are growing, the research exemplifies the AERA 2020 conference theme: “The Power and Possibilities for the Public Good When Researchers and Organizational Stakeholders Collaborate.”