The document discusses Bloom's original taxonomy of cognitive learning domains and a revised version. Bloom's original taxonomy arranged cognitive skills into a pyramid from basic recall at the bottom to evaluation at the top, with each level building on the previous ones. In 2001, Bloom's student Lorin Anderson revised the taxonomy, changing the names of the levels and basing them on four types of knowledge. The revised taxonomy renames the levels from remembering to creating and arranges them as remembering, understanding, applying, analyzing, evaluating, and creating. Examples of learning activities are provided for each level in both versions.