In 1960, Dr. rosental of Harvard University performed a famous experiment at a school in California.
At the beginning of the new school year, Dr. rosental asked the principal to call three teachers into the office and said to them, "based on your past teaching performance, you are the best teacher in the school. Therefore, we specially selected 100 smartest students from the school to form three classes for you to teach. These students have higher IQ than other children and hope you can make them better ."
The three teachers are happy to say that they will do their best. The principal also told them not to let the children or their parents know that they have been chosen as usual, and the teachers agreed.
A year later, the students in these three classes ranked first in the school district. At this time, the principal told the teachers the truth: these students are not the best students deliberately selected, but the most common students randomly selected. The teachers did not expect this. They thought their teaching level was indeed high. At this time, the principal told them another truth, that is, they are not the best teachers in the school, but also ordinary teachers randomly selected.
Before doing anything, if you fully affirm yourself, it will be half done.
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