The Center on Standards, Alignment, Instruction, and Learning (C-SAIL), examines 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 Texas Essential Knowledge and Skills (TEKS) state standards in English language arts (ELA) and math. 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 are examined. This report highlights key survey findings on teacher perceptions on curriculum, professional development, assessments, technology, SWDs, and ELs. Detailed insights from the six case study districts, emphasizing Texas's innovative practices and notable challenges are shared.