Introduction to Bloom's Taxonomy
Bloom’s Taxonomy Overview
The six levels (lower to higher)
- Knowledge: recall facts
- Comprehension: explain in own words
- Application: apply to new situation
- Analysis: take apart, find causes
- Synthesis: put together, create, predict
- Evaluation: judge with criteria, argue
Lower order vs higher order
- Levels 1-3: lower order thinking
- Levels 4-6: higher order thinking
- Most schools teach mostly at levels 1-2
Bloom’s contribution
- Developed by Benjamin Bloom in 1956
- Classifies learning in the cognitive domain
- Helps teachers write better objectives and assessments
A teacher who plans a lesson must decide what kind of thinking they want students to do. A lesson aimed at recalling facts is different from a lesson aimed at solving problems or judging arguments. Without a clear taxonomy of thinking, teachers default to whatever feels familiar, which usually means recall.
Bloom’s Taxonomy gives teachers a clear ladder of thinking levels. The next four articles cover each level (or pair of levels) in detail.
Who Benjamin Bloom was
Benjamin Bloom was an educationist who studied how students think and learn. In 1956, he and a group of colleagues developed a classification of learning objectives in the cognitive domain. They called it the Taxonomy of Educational Objectives, but the name shortened over time to Bloom’s Taxonomy.
The word “taxonomy” simply means classification. Bloom’s classification has six levels of thinking. Each level is more demanding than the one below it.
Bloom’s contribution has lasted. Even decades later, no serious work on learning objectives can be done without referring to his taxonomy. The framework has held up because it captures something real about how thinking develops.
The six levels
Bloom identified six levels of thinking. They are organized from the simplest at the bottom to the most demanding at the top. A student who can perform at level 6 has built up through the lower levels first.
Level 1: Knowledge. The student recalls memorized information. Facts, dates, names, definitions. The student is reproducing what they have stored. No new thought is required. Example: list the seven continents.
Level 2: Comprehension. The student explains information in their own words. They have understood rather than memorized. Example: describe the water cycle in your own words.
Level 3: Application. The student applies what they know in a new situation. Knowing the formula is not enough; the student uses it to solve a real problem. Example: use the formula for area to calculate the area of your geometry box.
Level 4: Analysis. The student takes information apart and examines its components. They identify causes, draw conclusions, and analyze relationships between ideas. Example: what factors influenced Quaid-e-Azam to formulate the 14 Points?
Level 5: Synthesis. The student puts pieces together to create something new. They predict, design, and solve open-ended problems. Example: how would you solve the problem of indoor air pollution in a Pakistani home?
Level 6: Evaluation. The student judges value or quality using clear criteria. They build arguments and defend positions. Example: which Prime Minister of Pakistan was most successful, and why?
Each level is built on the previous ones. A student cannot evaluate without analyzing. They cannot analyze without applying. They cannot apply without comprehending. Comprehension itself rests on knowledge.
Original and revised Bloom
The list above is the original 1956 taxonomy. In 2001, Anderson and Krathwohl published a revised version with two main changes: the levels are renamed as verbs (Remember, Understand, Apply, Analyze, Evaluate, Create), and the top two levels are swapped, so Create (formerly Synthesis) is now the highest level.
This guide uses the original taxonomy with Evaluation at the top. This study guide follows the same convention. If you read other sources that put Create at the top, they are using the revised version. Both are widely used in education.
Lower order versus higher order
Educators often divide Bloom’s six levels into two groups.
Lower order thinking covers Knowledge, Comprehension, and Application (levels 1-3). The student is working with information that the teacher or textbook has provided. Even at the application level, the student is using formulas and concepts that were taught.
Higher order thinking covers Analysis, Synthesis, and Evaluation (levels 4-6). The student is going beyond what was provided. They are reasoning about causes, creating new outputs, and forming arguments. Several different right answers are possible at these levels.
Note a small disagreement among educators about where Application sits. Some place it firmly in the lower-order group. Others see it as a transition zone toward higher-order thinking. The exact boundary matters less than the bigger point: levels 4-6 demand thinking that levels 1-3 do not.
A school whose teaching and assessment stay only at levels 1-2 produces students who can recite but cannot think. A school that pushes students into levels 4-6 produces students who can analyze, create, and evaluate.
Lower order: levels 1-3 (Knowledge, Comprehension, Application). Higher order: levels 4-6 (Analysis, Synthesis, Evaluation).
Lower order works within information the teacher provided.
Higher order goes beyond: students reason, create, and judge.
Many schools teach mostly at levels 1-2 and produce students who can recite but not think.
Why teachers should care
Bloom’s Taxonomy is more than an academic framework. It directly shapes three things teachers do every day.
1. Writing instructional objectives. Bloom’s Taxonomy adds a layer: the verb in the objective tells you which level of thinking you are demanding. “List five cities” stays at Knowledge. “Compare and contrast two cities” pushes into Analysis. “Design a plan to solve traffic in your city” reaches Synthesis. The verb encodes the level.
2. Designing assessment. A test of recall measures Knowledge. A test of essay-writing measures Comprehension or higher. Open-ended problems measure Synthesis. Argumentative essays measure Evaluation. Without Bloom’s framework, teachers default to recall tests because they are easy to grade. With the framework, teachers can build assessments that reach the levels their lessons aim at.
3. Diagnosing why students struggle. A student who fails at one level may have a gap at a lower level. A student who cannot solve word problems (Application) may not actually understand the formula (Comprehension). A student who cannot write a good essay (Synthesis) may not be able to explain the topic in their own words (Comprehension). The taxonomy helps teachers locate where the gap is.
A teacher who internalizes Bloom’s six levels has a sharper toolkit for everything from lesson planning to grading.
What this chapter covers
The next four articles cover the six levels in detail.
- Knowledge and Comprehension together: the lowest two levels, where most schooling sits today.
- Application: the third level, where Mathematics demands more thinking than other subjects.
- Analysis and Synthesis together: the first two higher-order levels, where students take ideas apart and put them back together in new ways.
- Evaluation: the sixth and highest level, where students build arguments and judge with criteria.
By the end of the chapter, a teacher should be able to write objectives at any level, recognize which level a question is at, and design lessons that move students up the taxonomy over time.
The level of the assessment must match the level of the objective
If the objective aims at Application (use the formula in a new situation), a recall test measures the wrong thing.
If the objective aims at Synthesis (design a solution), a multiple-choice test measures the wrong thing.
The taxonomy keeps assessment honest.