This document discusses the importance of blackboard skills for teachers. It states that the blackboard is a reflection of the teacher's personality and quality of teaching. It provides several tips for effective blackboard usage including cleaning the board before use, using good quality chalk, writing clearly in a straight line so students can see, and leaving space between letters, words and lines. The document also outlines several sub-skills of blackboard writing like appropriate letter sizing, correctness, speed and planning of writing. Overall it emphasizes that the blackboard is a valuable visual aid that helps students understand concepts if used properly.