In this activity, students will classify different organisms into producers, consumers, and decomposers. As an extension, I like to have the students create a food chain with three of the organisms (making sure that they select an organism from each category).
Before class, cut out each card and rubber band them together. I print the cards on card stock and use them over and over. I often use this activity as a warm up or review at the beginning of class. I keep several answer keys, so students that finish quickly become expert checkers. With the help of student checkers, this activity can easily be finished in five minutes for the whole group. I also pull these cards out right before our state standardized test. They are a great review for topics we study at the beginning of the year.