Throughout the Teachers Manual are sprinkled examples of journal pages by students who took the course given by an instructor using this manual.
One especially useful page has a list of suggestions for preparing "Observation Trays" ~ collections for the students to examine before going out to sketch. These include items collected (by you or the students) locally to pique their interest in finding interesting things to draw; and might include such things as pine cones, seed pods, owl pellets, pussy willow "kittens," beaver-chewed sticks, etc.
One section of the book details how to prepare effective collections to intrigue and focus the students on the subject at hand.
There is also a valuable section suggesting places to locate and buy such supplies as hand lenses, owl pellets, etc.