Look beyond the slide and climber to the many ways outdoor learning environments and play spaces may be used to support child development and learning. Topics include activity planning, environmental design, and selection of materials and equipment. 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.