The Common Core State Standards (CCSS) for English language arts (ELA) called for several "key shifts" in classroom instructional practice. This study combined archived video data on classroom teaching collected in 2010 with new video data on classroom teaching collected in 2018 to conduct a pre-/postexamination of the extent to which this corpus of lessons showed the kinds of key shifts in ELA instruction called for by the CCSS. The data presented in the article show meaningful time trends consistent with some, but not all, of the key shifts in ELA instruction called for by the CCSS. These findings are discussed in light of the goals of the study and prior research on post-CCSS instruction in classrooms across the country.