The "Infant CLASS Dimensions" form is a structured tool used for observing and assessing various aspects of caregiving in infant classrooms. The form is divided into several sections, each focusing on different dimensions of interaction between caregivers and infants. In the "Beginning" section, observers record the type of activity they are observing, such as centers, circle time, or snack time, and provide a summary of their visit. The core of the form lies in the "Responsive Caregiving" section, which evaluates specific indicators of relational climate, teacher sensitivity, facilitated exploration, and early language support. Each indicator is detailed with behaviors such as eye contact, responsiveness to infants' cues, and language enrichment activities. Observers rate these behaviors based on whether they were observed, need support, were not observed, or were missed opportunities. Additionally, there are sections for detailed notes and overall relational climate ratings, allowing for nuanced feedback on the caregiving environment. The form concludes with closing comments and a checkbox to indicate if follow-up is needed, ensuring that any critical issues are addressed promptly. This tool aids in promoting effective and nurturing interactions in infant classrooms, focusing on the developmental needs of the youngest learners. Sections: Beginning Responsive Caregiving Closing