Educational expert Benjamin S. Bloom identified six levels of cognitive activity: knowledge, comprehension, application, analysis, synthesis, and evaluation.1 (A recent update recasts synthesis as creating and moves it above evaluation to the highest level.) Each level acts as a foundation for the next. Each also demands higher thinking skills than the previous one. Experienced readers, however, jump among these levels, gathering information and insight as they occur.

The first three levels are literal skills, building blocks of thought. The last three levels — analysis, synthesis, and evaluation — are analytical skills that your instructors especially want you to develop. To read critically, you must engage with a reading on both literal and analytical levels. Suppose you read in your history book a passage about Franklin Delano Roosevelt (FDR), the only American president elected to four consecutive terms.

Knowing. Once you read the passage, even if you have little background in American history, you can decode and recall the information it presents about FDR and his four terms in office.

Comprehending. To understand the passage, you need to know that a term for a U.S. president is four years and that consecutive means “continuous.” Thus FDR was elected to serve for sixteen years.

Applying. To connect this knowledge to what you already know, you think of other presidents — George Washington, who served two terms; Grover Cleveland, who served two terms but not consecutively; Jimmy Carter, who served one term; the second George Bush, who served two terms. Then you realize that four terms are quite unusual. In fact, the Twenty-second Amendment to the Constitution, ratified in 1951, now limits a president to two terms.

Analyzing. You can scrutinize FDR’s four terms from various angles, selecting a principle for analysis that suits your purpose. Then you can use this principle to break the information into its components or parts. For example, you might analyze FDR’s tenure in relation to that of other presidents. Why has FDR been the only president elected to serve four terms? What circumstances contributed to three reelections?

Synthesizing. To answer your questions, you may read more or review past readings. Then you begin synthesizing — creating a new approach or combination by pulling together facts and opinions, identifying evidence accepted by all or most sources, examining any controversial evidence, and drawing conclusions that reliable evidence seems to support. For example, you might logically conclude that the special circumstances of the Great Depression and World War II contributed to FDR’s four terms, not that Americans reelected him out of pity because he had polio.

Evaluating. Finally, you evaluate the significance of your new knowledge for understanding Depression-era politics and assessing your history book’s approach. You might ask yourself, Why has the book’s author chosen to make this point? How does it affect the rest of the discussion? And you may also have concluded that FDR’s four-term presidency is understandable in light of the events of the 1930s and 1940s, that the author has mentioned this fact to highlight the era’s unique political atmosphere, and that, in your opinion, it is evidence neither for nor against FDR’s excellence as a president.