A diagram helps explain. Often times, though, students do not include a diagram with their procedure. I am not sure why including a diagram seems foreign to my students. I find myself having to give them permission to include one when, honestly, their procedures do not make a lot of sense without a diagram.
This post is quick but necessary. Give your students permission to include diagrams in their procedures. You may be surprised at what you all discover!
Talking and Teaching Science 