This product is a half-sheet trifold fold-up which defines 3 types of symbiotic relationships: Parasitism, Commensalism and Mutualism. In addition to the definition, an example of each is given as well. The teacher has two fold-up options: For the teacher short on time, run a completed inside sheet. This fold-up will be finished and ready to be used by students with just a few simple folds. If the teacher has time and would like the fold-up to be more interactive, run the fill in the definition and example inside sheet. A parts sheet will have to be run too (3 sets of parts per page.) Directions on how to assemble a trifold fold-up are included. As always, I recommend running one test copy to make sure everything folds up properly. Fold-ups are a wonderful resource that fit well in an interactive notebook or can be used as a stand alone resource. I find that my students refer to the fold-ups throughout the entire school year!