In the following scenario, what has Emily's teacher failed to take into account? A mother comes into the school and complains that her fifth-grade daughter, Emily, has always earned scores of "exemplary" or "outstanding" when allowed to work independently. When Emily is forced to work in groups, her grades suffer.

The teacher decides that if Emily wants to do all the work herself, she can—but tells the mother that it will mean Emily doing three times as much work on her project.