A pilot study was carried out to test a curriculum developed to teach thinking at the fourth and fifth levels of Bloom’s Taxonomy of Educational Objectives: Cognitive Domain. The questions asked were: (1) Will the data this study support the basic assumption that Bloom’s Taxonomy is a cumulative hierarchy of thinking levels?; and (2) If achievement occurs, will it be dependent on student intelligence? The material developed (15) was taught to a fifth and a sixth grade class over a ten-week period and tested with an achievement test that followed the first five levels of Bloom’s Taxonomy. The test results generally supported the basic assumption of the Taxonomy. Significant achievement occurred at all levels of the Taxonomy. Furthermore, intelligence did not significantly differentiate achievement between students in the upper and lower thirds of the IQ scale.
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