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The Cornell Critical Thinking Test (CCTT) is available in two levels. Level X is aimed at Grades 4-14 and Level Z at college students and adults, although it can be used with advanced or gifted high school students. Both levels of the test are entirely multiple-choice.

Level X contains sections on induction, credibility, observation, deduction, and assumption identification.

Level Z contains sections on induction, credibility, prediction and experimental planning, fallacies (especially equivocation), deduction, definition, and assumption identification.

Mind Benders are recommended below. These are deductive logic puzzles. Start with A4 or B1 depending on your current level and get additional books or software only if you don't feel you've mastered the skill after completing the first book. Critical Thinking is a classic traditional critical course covering everything you need to know. While it can be used by a motivated individual it is designed as a discussion course. Younger children may have difficulty with some of the material in the first book.
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Mind Benders Book 4
Mind Benders Book 4
Our Price: $10.99

Grade(s): 3-6
Activities: 60
Pages: 48, perforated
Features: reproducible for home or single classroom use

Our best-selling deductive thinking puzzles develop logic, reading comprehension, and mental organizational skills that are vital to achieving high grades and top test scores in all subjects. They’re also great for developing real-life, problem-solving skills.
Cornell Critical Thinking Test Specimen Set
Our Price: $19.99

Grade(s): 4-12+

Cornell sets the standard for all critical thinking tests. This is a test that a parent can administer at home and get a valid score. Specimen set contains two tests, one bubble sheet and an administration manual.
Cornell Critical Thinking Test Level X
Our Price: $29.99

Grade(s): 4-12+

Cornell sets the standard for all critical thinking tests. Classroom set of 10 Level X test booklets and answer sheets. Administration manual sold separately.
Cornell Critical Thinking Test Answer Sheet
Our Price: $3.99

Grade(s): 4-12+

Answer sheet (bubble sheet) for use with Cornell Critical Thinking Tests Level X and Z. One bubble sheet is included in the Specimen Pack.
Mind Benders: Book 5
Mind Benders Book 5
Our Price: $10.99

Grade(s): 7-12+
Activities: 26
Pages: 40

Mind Benders®, our best-selling deductive thinking puzzles, develop logic, reading comprehension, and mental organizational skills that are vital to achieving high grades and top test scores in all subjects. They're also great for developing real-life, problem-solving skills.
Mind Benders: C1
Mind Benders C1
Publisher Price $9.99
Our Price: $6.99
You save $3.00!

Grade(s): 7-12+
Activities: 14
Pages: 37

Deductive reasoning puzzles teach children logic and improve reading comprehension and test scores.
Mind Benders Book 7
Mind Benders Book 7
Our Price: $12.99

Grade(s): 7-12+
Activities: 26
Pages: 40

Mind Benders®, our best-selling deductive thinking puzzles, develop logic, reading comprehension, and mental organizational skills that are vital to achieving high grades and top test scores in all subjects. They're also great for developing real-life, problem-solving skills.
Mind Benders Book 8
Mind Benders Book 8
Our Price: $12.99

Grade(s): 7-12+
Activities: 26
Pages: 40

Mind Benders®, our best-selling deductive thinking puzzles, develop logic, reading comprehension, and mental organizational skills that are vital to achieving high grades and top test scores in all subjects. They're also great for developing real-life, problem-solving skills.
Critical Thinking Book 1, Student
Critical Thinking Book 1, Student
Our Price: $24.99

Grade(s): 7-12+
Activities: 70
Pages: 178

Critical Thinking teaches your child to think logically, present well-developed arguments, and see through unsupported arguments. Book One helps students develop the fundamentals of logic, argumentation, and critical reading.

Easy-to-understand explanations of concepts are followed by examples and real-life, often humorous, discussion problems. Students learn to identify valid and invalid claims and arguments, sufficient and insufficient evidence, fact and opinion, generalizations, emotional arguments, inferences, deductions, and more.

Instruction/Answer Guide sold separately.
Critical Thinking Book 1, Teacher
Critical Thinking Book 1, Teacher
Our Price: $10.99

Grade(s): 7-12+
Activities: 70
Pages: 178

Instruction guide to accompany Critical Thinking, Book 1
Critical Thinking Book 2, Student
Critical Thinking Book 2, Student
Our Price: $26.99

Grade(s): 7-12+
Activities: 66
Pages: 247

Critical Thinking teaches your child to think logically, present well-developed arguments, and see through unsupported arguments. Book Two builds on the skills developed in Book One, while teaching more advanced concepts.

Instruction/Answer Guide sold separately.
Critical Thinking Book 2, Teacher
Critical Thinking Book 2, Teacher
Our Price: $10.99

Grade(s): 7-12+
Activities: 66
Pages: 247

Instruction guide to accompany Critical Thinking, Book 2
Cornell Critical Thinking Test Level Z
Our Price: $29.99

Grade(s): 10-12+

Cornell sets the standard for all critical thinking tests. Classroom set of 10 Level Z test booklets and answer sheets. Administration manual sold separately.