In dogs, the toes are more spread out. Probably the most distinctive trait of the coyote track is in the pattern of the pads. The heel pad on dogs is typically long, projecting forward between the toes on all feet. The heel pad of coyotes' forefeet follows this pattern, but the hind feet are much narrower, generally not showing between the toes. Important behavioral differences between coyotes and dogs show in their tracks, as well.
Coyotes are typically out because they're looking for food.
As a result, they tend to walk in fairly straight lines along the boundaries between different habitats, where they are most likely to find something to eat. Dogs, on the other hand, are usually out for fun and exercise. Going out in the field and following a set of dog tracks and a set of coyote tracks can be a very rewarding experience. This exercise can be a great way to acquire an understanding of behavior and ecology. Making plaster casts of tracks to bring back to the classroom is another simple, inexpensive, and fun activity.