Producers, Consumers, and Decomposers 32 Task Cards You will find many uses for these task cards which reinforce understanding of how producers, consumers, and decomposers are different. Use these task cards: 1) In your science center 2) SCOOT 3) Quiz-Quiz-Trade 4) As a whole class warm-up or rev. Subjects: General Science. Grades: 2 nd, 3 rd, 4 th, Homeschool. Types: Cooperative Learning.