This paper reports on the illuminatory and exploratory phase of a study into how two educational systems are interconnecting content, policy, and teaching practice into science professional development (PD). New Zealand implemented a new curriculum in 2007 for full implementation in 2010, which should have altered how science was delivered in primary classrooms. New Zealand, however, began limited PD in science education in 2012. The state of Arkansas in the United States of America endorsed the Next Generation Science Standards in 2015, adopted the new Arkansas K-4 Science Standards in 2016 and Years 5-8 in 2017. Arkansas, however, began its science PD in 2015. Through face-to-face discussions during PD sessions, this study investigated how the teachers were experiencing PD explicitly based on the interconnections of content, policy, and practice. The results of this first phase highlight how due to their participation in PD, teachers in both Arkansas and New Zealand are now talking about how they build on what their students' know and have experienced. The implications of this research note teachers not only need both the time and opportunity to experience learning but also support as they then implement their new learning into their own classroom practice.