Standards for early learning (e.g., children ages 0-5; prekindergarten, preschool, and younger) vary widely in their technical quality and specificity. The Center on Standards and Assessment Implementation (CSAI) recently conducted a literature review to determine the landscape in early learning standards and science, specifically centered on the topics of engineering and domain-specific learning. Though many sources noted that inquiry-based learning activities are the natural domain of young children, very few studies or articles refer specifically to engineering or design-based processes and terms. In addition to the literature review, CSAI also conducted a scan of states' early learning standards to determine which states were incorporating more detailed recommendations in science for their early learners. This report is divided into the following three sections: This report is divided into three sections: (1) References: State Early Learning Science Standards; (2) References: Early Learning and Science Standards; and (3) References: Inquiry-Based Learning for Young Children.