Without a doubt, vivid language that allows students to visualize more clearly what we're trying to express during a lecture. I use anecdotes and metaphors whenever possible, because I do believe it makes lectures more memorable for students. This was a good module. It is important to give students a clear sense of where each class is going, and key points need to be repeated and reinforced. I had a teacher once in a history class who thought he was Teddy Roosevelt and jumped up on a table, a la charging up Kettle Hill, and I don't go to that extreme, but I do think students like to see a "personality" in front of the room, rather than a droning lecturer.