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MISSION:  To improve K-12 instruction of critical thinking skills.

The Case for
Critical Thinking
Everyone agrees critical thinking is paramount, but it doesn’t appear evident in political partisans, science deniers, and conspiracy theorists. They have access to all the same information, but they lack the skills to distin­guish fact from misinformation, all while claiming they are the true critical thinkers.

Most schools cite critical thinking as one of their highest goals. But the Common Core State Standards (CCSS) and Next Generation Science Standards (NGSS) have relatively few requirements for the fundamental skills of critical thinking. Consequently, the data below shows critical thinking skills get very little instruction time.

“Critical thinking” is a very abstract goal with a broad definition, so first let’s clarify the meaning, then break it down to more specific concrete skills.

Critical Thinking

Abstract Definition: Decision-making and problem-solving using reason, logic, analysis, unbiased objectivity, and good judgement.

Operational Definition: A critical thinker is one who detects and avoids bad reasoning, especially to detect false claims and avoid being fooled and manipulated, even when some information is unknown.

Measurable Objectives: The ability to identify and distinguish:
Fact vs Opinion
Correlation vs Causation
Credibility, Bias, Motive (Media Literacy)
Logical Fallacies
Scientific Method vs Pseudoscience
Empirical Evidence vs Anecdotal
Misleading Statistics
Deceptive Ad Techniques
See More


Logic, analysis, reason, objectivity, and judgement are included in the CCSS & NGSS standards. However, these are broad and highly subjective qualities. A student in class may write a objective analysis with sound reason, but then go online and sincerely push a conspiracy theory with a veneer of objective analysis and reason. To achieve critical thinking, they must learn more specific concrete skills to distinguish anecdotal experiences from evidence, correlation from causation, deceptive statistics, logical fallacies, etc. While education is never a guarantee, more education is better than less, and learning a broader range of objective and subject skills leads to higher critical thinking.

This chart shows how many standards in the CCSS & NGSS mention each concrete critical thinking skill. Notice how much less they are listed than Quadratic Equations.

Standards Qty Grade
Experimental Design 1 6-8
Correlation/Causation 1 9-12
Fact/Opinion 1 6-8
Fallacious Reasoning 3 9-10
Evaluate Claims 3 9-12
Credibility, Motive 11 6-12
Quadratic Equations 14 9-12
Vocabulary 17 4-12
See Data

Classroom data from over 500 schools shows a similar imbalance. Below are the relative number of assignments and tests given for various topics. Do you think this reflects the most important life skills for students to learn?

Assignments & Tests
Quadratic Eq.
Critical Thinking
Photosynthesis
Gravity
Media Literacy
Covalent Bonds
Synonyms
Experim. Design
Spelling
Antonyms
Fallacies
Fact/Opinion
Pseudoscience
Homonyms
Cause/Correlate
See Data

One of the first things taught in introductory
statistics textbooks is that correlation is not causation.
It is also one of the first things forgotten.
— Thomas Sowell

These skills need ongoing practice every semester, every year. If critical thinking is at least as important as math and vocabulary, then shouldn't it be taught as much?

Ideally, we should revise the CCSS & NGSS to include more fundamental skills for critical thinking at every grade level. In the meanwhile, we can augment the district and school curriculum, and schools might designate a Critical Thinking Coordinator to facilitate this.

On the Resources tab, I have curated many free lessons and resources, and I have developed free learning apps.

Educational institutions, from elementary schools to universities, could make critical thinking a greater part of their curricula. Rationality should be the fourth R, together with reading, writing, and arithmetic. Mere instruction fails to provide lifetime immunity to fallacies, and almost no one makes the leap from abstract principles to everyday pitfalls. But well-designed courses and video games — ones that single out cognitive biases, challenge students to spot them in lifelike settings, and provide immediate feedback — really can train them to avoid the fallacies outside the classroom.
— Steven Pinker,  Rationality