Creative Coloring: Design Elements by Art Sherman & Element of Space coloring page

This download includes a little advertisement for Art Sherman's Creative Coloring: Design Elements book.  I have this book and have used it occasionally for sub lessons, or sketchbook fillers.  I found most of the lessons to be confusing for intermediate students to be able to work on independently (and not very creative.)
The second page includes two of his coloring pages that help students "practice" the element of space, a long with color and pattern.  It could be good practice, but I don't recommend building a lesson around these.