The Director of Developmental Studies at my college called in all of the developmental writing instructors for a meeting. Among other things, we listened to a sales pitch for a new textbook. This textbook is apparently in wide use, and has been well received.
The promotional materials say that "textbooks should be visually appealing with bright colors, plenty of white space, and lots of diagrams and visual aids." This quotation is from someone with an Ed.D. who teaches at a large community college.
Well, I don't want to argue with anyone who has a doctorate in education. And certainly, this book has many bright colors. I especially like the orange, red, and yellow. Plus it has white space, which is white. And it has fascinating visual aids. For example, when the authors wish to link two concepts, they put a picture in the margin of two linked paper clips. Clever, huh?