Examine the components of professionalism that promote a successful work environment and relationships, including ethical codes of conduct, federal, state and local organizations that support professional development in child care and education. 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 Professionalism.