Examine what the term Developmentally Appropriate Practices (DAP) means in the context of working with children of all ages and abilities. Learn the national standards and the role of the teacher including practical strategies you can apply to support each child's learning and development at every age and stage. This course is designed to help you get your program aligned with Maryland EXCELS as well as help you reach higher Maryland Child Care Credential levels. Credential Boosters are classes that are identified by the Maryland State Department of Education in the Staff Credential modifications for levels 2, 3 and 4. Maryland State Education Core of Knowledge: 3 hours Curriculum.