I would love to see the cell that contains the text header a different color. I think this would help students identify sections better. Indentations help, but can still be confusing too many students. Perhaps the Module Header can be either Black with White Text, Hex #666666, and then Text Headers can be #333333. Perhaps the color changes by indentation level too or provide the ability for us to edit the cell and use our own color scheme. Perhaps school colors.