From the abstract: "Early science, technology, engineering, and math (STEM) learning experiences often exclude children with disabilities and intersecting identities. To promote learning in STEM for all children, the Curriculum Research Framework (CRF) was applied to build learning trajectories of STEM for children from birth to age 5. The CRF was extended and enhanced to generate explicitly inclusive learning trajectories for children with and without disabilities. The process of generating a priori foundations, building learning trajectories, and testing the results in inclusive settings led to new resources for early childhood education (ECE) and early childhood special education (ECSE) practitioners and generated implications for creating and evaluating learning trajectories in ways that affirm that all children belong in STEM. Challenges faced and lessons learned in this process are presented to guide future research and development using the revised and enhanced CRF."