The Center on Standards, Alignment, Instruction, and Learning (C-SAIL), examines through four lines of study to determine how college- and career-readiness (CCR) standards are implemented, if they improve student learning, and what instructional tools measure and support their implementation. This brief presents findings from C-SAIL's Implementation Study, which uses interview and survey data to explore how district administrators, principals, and teachers are understanding, experiencing, and implementing the Kentucky Academic Standards (KAS) in English language arts (ELA) and math. Examined are how and what kinds of supports are provided to teachers of all students, including students with disabilities (SWDs) and English learners (ELs) who take the general state assessment. Other district characteristics were examined such as percentage of students receiving free or reduced-price lunch, student achievement or growth rates, and geographic location within the state--to ensure that the districts represented a range of contextual factors. Key findings on teacher perceptions on curriculum, professional development, assessments, SWDs, ELs, and outreach/communication are highlighted. Detailed insights from district officials in the six case study districts, emphasizing Kentucky's innovative practices and notable challenges are also shared.