As districts continue to implement the Common Core State Standards (CCSS), English language arts (ELA) teachers and content-area teachers may find themselves collaborating in surprising and welcome new ways. The CCSS's emphasis on reading and writing across all content areas provides an opportunity for ELA teachers to emerge as literacy experts in their schools and beyond. Since 2011, teacher-leaders in the Missouri Writing Projects Network (MWPN) have embraced this challenge. Supported by the Missouri Department of Elementary and Secondary Education, MWPN sites designed professional learning programs that focused on literacy learning in both the content-area and career and technical education (CTE) classrooms. This article chronicles work that is focused on content-area writing, as stressed in the CCSS, and that partnered language arts teachers with career/technical educators.