The two schools stood side-by-side with a fence in between, the Girls in the south-building and the boy's in the north building.

The south building had originally been built in 1909 to house the "Central Grammar School".

[2][6] The campus also hosts a "Performing Arts Center," opened in November 2009, which includes a theatre, basketball court, additional classrooms, a 4,000 seat stadium, rehearsal room, and a range of multi-use spaces.

[15][16][9] The IB Career Programme courses which Decatur offers include: Architectural Drawing and Design, JROTC, Career & Technical Instruction, Certified Nursing Assistant Certification, Computer Science, Convergence Media/Audio-Visual Technology Film, Culinary Arts, Early Childhood Education, Furniture Design, Graphic Design, IB Design Technology, Teaching as a Profession, and Work-Based Learning.

[9] Athletic activities include Baseball, Basketball, Cross Country, E-Sports, Flag Football, Football, Golf, Gymnastics, Lacrosse, Literary, Soccer, Softball, Swimming, Tennis, Track, Volleyball, Water Polo, and Wrestling.