Knowledge of assessment tools that include but are not limited to: Desired Results Developmental Profile (DRDP-15), Ages and Stages Questionnaire (ASQ-3), Environmental Rating Scale (ERS) both infant/toddler and preschool, and Classroom Assessment Scoring System (CLASS). Early Childhood Teachers ensure a high quality infant, toddler, preschool, and laboratory education program for Stanislaus students, young children, families, and the community at large.