Although existing literature suggests that teachers perceive, mobilize, and leverage resources to support ambitious instruction, less is known about how teachers and students jointly take up resources for co-constructing scientific knowledge. This study examines how teachersThere is a rich body of scholarship in educational policy, mathematics, and most recently, science education that has examined how teachers utilize resources to support and sustain ambitious instruction. Resources are the set of social, material, and intellectual tools that teachers use to support disciplinary learning in classrooms (Cohen et al., 2003;Lampert et al., 2011). Teacher-teacher interactions in professional learning communities or professional development sessions can become resources when they facilitate the exchange of new pedagogical ideas or support teachers use of new curriculum materials (Frank et al., 2004;Horn et al., 2020). Teacher's advice-seeking networks or district-level policies can also become resources when they help teachers build the social capital that is needed to sustain ambitious pedagogies within and across schools (Coburn et al., 2012). Policy documents, curriculum materials, or technological tools can stimulate teachers to re-examine what it means to know and understand a discipline, and bring their new knowledge about disciplinary inquiry into their classroom by experimenting with new discourse routines, texts, and tools (