Franklin's Secret Club would be a wonderful story to teach students the importance of not leaving people out of activities and including each other. This would be good to use in a kindergarten through 3rd grade class. This book could be used to teach about friendship. It could also be used if anyone in the class is being left out of things. It would be a good way not to single anyone out but to still get the message across. This could also be used as a writing prompt where the class could write about a time they were left out of something and how it made them feel.