The essence of the jigsaw route to learning is to require that students work together to master the material to be tested on an upcoming examination. This end is accomplished by grouping students into cooperating teams and giving each student only part of the information—one piece of the puzzle—necessary to pass the test. Under this system the students must take turns teaching and helping one another. Everyone needs everyone else to do well. Like Sherif’s campers working on tasks that could be successfully accomplished only jointly, the students become allies rather than enemies.