4. Discuss the relative advantages and disadvantages of studying how class size influences learning using each of thefollowing three approaches: (a) controlled laboratory studies, (b) analysis of results created by natural variation in classsizes across classrooms, (c) large field experiments such as Project Star.
5. Each school included in the Project STAR study had to have a large enough student body to form at least one ofeach of the three class types—small (thirteen to seventeen students), regular (twenty-two to twenty-six student), andregular with a full-time teacher aide (twenty-two to twenty-six students). Why was this aspect of the design important.
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