This document discusses the use of chalkboards in classrooms. It defines chalkboards and lists the different types, including blackboards, green boards, and whiteboards. The document outlines several advantages of chalkboards over whiteboards, such as being inexpensive, easy to use, and visible. It provides tips for organizing information on the board, such as including a title, headings, and arranging content in a logical order. Finally, the document discusses using the board to display information, involve students through activities, and ensure students can see and copy what is written on the board.