This study investigated the current practices and training needs of early childhood professionals in conducting assessment with young children with and at-risk of disabilities. The findings reveal that the participants reported that they used a wide range of standardized tools and nonstandardized methods to assess children’s development in the developmental domains. Three of the top five tools most frequently used by professionals to assess children’s skills are curriculum-based assessment methods that are developmentally based and that take into consideration the child’s experiences and background. The authors recommend that preservice teacher preparation programs must include numerous targeted field assignments. Furthermore, preservice teachers must receive instruction in how to use a few of the most commonly used tools and assessment methods.