A blackboard is a reusable writing surface coated with a dark, matte material, traditionally used with chalk to convey information, visuals, or temporary notes. Historically associated with education, it has also served practical and artistic functions, ranging from classroom instruction to workshop diagrams and creative exercises. Authors like N. Hawkins emphasized its utility in workshops, while M. C.
Hillick highlighted its role in teaching scrolling methods. Walter Lowrie Hervey advocated for simplicity in blackboard design, and Martin Grove Brumbaugh underscored its value in reviewing lessons. Ida Cassa Heffron celebrated its freedom for artistic expression, and Frederick Whitney linked it to student engagement. These varied perspectives reveal the blackboard as both a teaching tool and a medium for dynamic, collaborative communication.