In 2017, the Office of Planning, Research, and Evaluation (OPRE) in the Administration for Children and Families (ACF) funded Mathematica to conduct the Infant and Toddler Teacher and Caregiver Competencies (ITTCC) project. The project aims to examine existing efforts across states, institutions of higher education, professional organizations, and early care and education (ECE) programs related to competencies for infant and toddler (I/T) teachers and caregivers who work in group settings and build a conceptual foundation to inform future measurement, research, and evaluation. This compendium describes the results of a scan of competency-aligned measures. The purpose of this compendium is to offer the early childhood education field a sense of existing options for assessing competencies for I/T teachers and caregivers who work in group care settings (centers and family child care homes). The measures included in this compendium were identified through prior activities undertaken for the ITTCC project, including the scan of existing competency frameworks and the literature review, and based on additional expert input. For each measure, the authors developed a profile that includes key information about the focus of the measure and how it has been or can be used. Although these profiles are not exhaustive, they include important information about the specific competencies the measures address and how they have been used to assess the competencies of I/T teachers and caregivers.