Bulletin board- surface intended for the posting of public messages. Characteristics includes: - Effective communication - Legibility - Correctness - durability General purposes of bulletin board: 1. Decorative- they offer simulation and appeal to the aesthetics. 2. Motivational- encourage students to perform better and have greater confidence. 3. Informational- Used to disseminate information. 4. Instructional- invite students to respond and participate.