While few would disagree that a key component of educating teachers to teach happens on the job, research rarely explores the schoolhouse as a site for teacher education. This study thus focuses on inservice as distinct from preservice teacher education and explores how beginning teachers' learning about mathematics and literacy instruction was supported within 24 elementary schools in two midwestern school districts. A mixed methodology was used in this exploratory study, including social network and interview data analysis, to examine beginning teachers' advice- and information-seeking behaviors related to mathematics and literacy. Findings revealed that formal organizational structures inside schools were critical for shaping beginning teachers' opportunities to learn about instruction, including grade level teams and formal leadership positions.