Yes. You could try to photocopy each page of the Student Activity Book for each child, but you can save the cost and time of copying by purchasing one for each child. We also try to keep the cost down on the Student Activity Books for this same reason.
If you have children in 3rd/4th grade and under, a Student Activity Book might be a bit much. Instead, we have created a resource called All American History Jr. to fill the void of a Student Activity Book for younger students. It comes with coloring pages, maps, notebooking pages, and a revised lesson plan all with younger audiences in mind.