Robert Rosenthal and Lenore Jacobson's study showed that, if teachers were led to expect enhanced performance from children, then the children's performance was enhanced. This study supported the hypothesis that reality can be positively or negatively influenced by the expectations of others, called the observer-expectancy effect. Rosenthal argued that biased expectancies could affect reality and create self-fulfilling prophecies. All students in a single California elementary school were given a disguised IQ test at the beginning of the study. These scores were not disclosed to teachers. Teachers were told that some of their students (about 20% of the school chosen at random) could be expected to be "intellectual bloomers" that year, doing better than expected in comparison to their classmates. The bloomers' names were made known to the teachers. At the end of the study, all students were again tested with the same IQ-test used at the beginning of the study.
The tools contained here were developed through a partnership of UNESCO, the Commonwealth Secretariat, the Commonwealth of Learning (COL), Microsoft and the Ministries of Education of a number of countries in the Caribbean and Pacific committed to enhancing Teacher Education. [https://dev.col.org/news/champion-ict-integration-teaching-and-learning-21st-century/]