We used Standards 3 and 4 of the Association of Middle Level Education (AMLE) 2022 Revised Middle Level Teacher Preparation Standards and The Successful Middle School: This We Believe characteristics as frameworks and presented a synthesis of the research literature (2015–2024) on the curriculum, instruction, and assessment related to middle-level teacher development. This review was part of a larger exploration of middle-level teacher development. Initially, we located 63 articles through our search terms on the curriculum, instruction, and assessment in teacher development. From there, we contributed to an updated research agenda for middle-level education . Through continued analysis and discussion, we identified trends in each area and across these three areas. We review the literature, highlight trends, and offer recommendations for middle-level educators and researchers.