<P> Some consider the three lowest levels as hierarchically ordered, but the three higher levels as parallel . Others say that it is sometimes better to move to Application before introducing concepts, the idea is to create a learning environment where the real world context comes first and the theory second to promote the student's grasp of the phenomenon, concept or event . This thinking would seem to relate to the method of problem - based learning . </P> <P> Furthermore, the distinction between the categories can be seen as artificial since any given cognitive task may entail a number of processes . It could even be argued that any attempt to nicely categorize cognitive processes into clean, cut - and - dried classifications undermines the holistic, highly connective and interrelated nature of cognition . This is a criticism that can be directed at taxonomies of mental processes in general . </P> <P> Bloom's taxonomy serves as the backbone of many teaching philosophies, in particular, those that lean more towards skills rather than content . These educators view content as a vessel for teaching skills . The emphasis on higher - order thinking inherent in such philosophies is based on the top levels of the taxonomy including analysis, evaluation, synthesis and creation . Bloom's taxonomy can be used as a teaching tool to help balance assessment and evaluative questions in class, assignments and texts to ensure all orders of thinking are exercised in students' learning, including aspects of information searching . </P> <P> The skill development that takes place at these higher orders of thinking interacts well with a developing global focus on multiple literacies and modalities in learning and the emerging field of integrated disciplines . The ability to interface with and create media would draw upon skills from multiple levels of the taxonomy including analysis, application and creation . Bloom's taxonomy (and the revised taxonomy) continues to be a source of inspiration for educational philosophy and for developing new teaching strategies . </P>

Who proposed the six levels of critical thinking