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The Critical Thinking Co.™
The Critical Thinking Co. - Empower the Mind
The Critical Thinking Co. - Empower the Mind

The Critical Thinking Co.™'s posts

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Crypto Mind Benders®: Famous Quotations (Grades 3-12+)

This fun, thought provoking 48-page book of puzzles, develops mathematical reasoning and critical thinking skills that are vital to achieving academic and lifelong success. They're great for introducing students to encryption, algebraic thinking, and basic computer programming operations.

Each puzzle requires students to break a secret code so they can identify a hidden quotation. To break the code, students must apply logic and mathematical reasoning to 3-sets of clues. The challenge is getting all the information out of each clue! Once students break the code, they can solve the cryptogram by substituting the numbers with their corresponding code letters. This book familiarizes students with classic quotations from famous thinkers such as Albert Einstein, Voltaire, Socrates, and more!

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Mathematical Reasoning™ Level F (Grade 5)

Forget boring math lessons and dreaded drill sheets. This fun, colorful 448-page book uses engaging lessons with easy-to-follow explanations, examples, and charts to make fifth grade mathematical concepts easy to understand. It can be used as a textbook or a comprehensive workbook with your textbook to teach the math skills and concepts that students are expected to know in fifth grade—and several concepts normally taught in sixth grade. This book emphasizes problem-solving and computation to build for success in higher-level math and math assessments.

Every lesson is followed with a variety of fun, colorful activities to ensure concept mastery. The lessons and activities spiral slowly, allowing students to become comfortable with concepts, but also challenging them to continue building their problem-solving skills. This book teaches more than mathematical concepts; it teaches mathematical reasoning, so students learn to devise different strategies to solve a wide variety of math problems. It is written to the standards of the National Council of Teachers of Mathematics.


• Addends
• Addition
• Age
• Analyze Data
• Angles
• Area
• Bar Graph
• Calendar
• Capacity
• Characteristics
• Circle Graphs
• Coins
• Congruence
• Coordinates
• Count
• Data Analysis
• Data Collection
• Decimals
• Division
• Equations
• Equivalence
• Estimate
• Expanded Notation
• Fractions
• Graphs
• Inequalities
• Language
• Length
• Match
• Mean
• Median
• Mode • Money
• Multiplication
• Negative Numbers
• Number Lines
• Odd/Even
• Order
• Parallel
• Patterns
• Perimeter
• Perpendicular
• Place Value
• Prediction
• Prime/composite
• Probability
• Properties
• Real World Problems
• Reflection/Translation/Rotation
• Regrouping
• Rounding
• Rulers
• Shapes
• Subtraction
• Survey
• Symmetry
• Tables
• Temperature
• Time
• Variables
• Weight
• Whole Numbers
• Word Problems

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U.S. History Detective® Book 2 (Grades 8-12+)

What makes this 320-page book different from other American history book is the integration of critical thinking into the content lessons. The questions in this book require deeper analysis and frequently ask for supporting evidence from the lesson. This in-depth analysis produces greater understanding, which results in better grades and higher test scores. Over time, students who practice critical thinking learn to apply it throughout their education and lives. This book also develops reading comprehension and writing skills, and challenge students to learn new vocabulary.

This colorful book brings U.S. history to life! It is full of fascinating facts, pictures, and maps. It can be used as a stand-alone textbook, supplement to your textbook, or as a review course for older students. The vocabulary and content skills are based on common state social studies standards. This book has both primary and secondary source information. Each lesson provides a passage students must read, followed by a series of questions. Questions are multiple choice, short answer, or short essay questions. Students are frequently asked to identify sentence evidence from the lesson that best supports the answer. Sample answers are provided which identify key points for the essays. In addition, there are section review activities and some bonus activities.

In these books, students will:
• Supply supporting evidence for many of their answers
• Supply essay evidence to support their conclusions by drawing on specific information from the lesson
• Draw inferences and conclusions based on their evaluation of the evidence
• Distinguish between facts and opinions
• Analyze historical chronology to see history as a series of interrelated events
• Acquire new vocabulary
• Learn to interpret and draw information from geographical maps, political cartoons, and charts

U.S. History Detective® Book 2 focuses on the late 1800s to the 21st century. The lessons and activities in this book are organized around these time periods:
• The Gilded Age: 1870-1900
• Imperialism and Progressives: 1890s-1910s
• The Great War: 1914-1919
• The Roaring Twenties: 1920-1929
• The Great Depression: 1929-1939
• World War II: 1939-1945
• The 1950s
• The 1960s
• The 1970s
• The 1980s
• The 1990s
• Bridge to the 21st Century

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Language Smarts™ Level C (Grade 2)

This fun, colorful 352-page book can be used as a textbook or a comprehensive workbook with your textbook to teach reading, writing, grammar, and punctuation skills and concepts that students are expected to know in second grade. They also develop critical thinking, vocabulary, and several other skills and concepts normally taught in third grade.

The engaging lessons include easy-to-follow explanations, examples, and charts for visual learners—and there is no lesson preparation! Each lesson is followed by a variety of fun, colorful, mind-building activities that use different genres.

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Editor in Chief® Level 2 (Grades 6-8)

This fun, highly-effective 160-page book teaches students in Grades 6-8 grammar, punctuation, spelling, capitalization, and critical reading in a standards-based thinking approach instead of the usual drill and practice found in competing products. Students begin with an easy-to-understand lesson followed by an activity that require students to carefully analyze and edit stories, letters, or articles that contain mechanical errors. This effective method allows students to gain mastery over concepts that will translate into their own writing.

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Mind Benders® Level 4 (Grades 3-6)

This 48-page book contains several of our best-selling deductive thinking puzzles. It develops the logic, reading comprehension, and mental organization skills vital to achieving higher grades and top test scores in all subjects. These award-winning, fun puzzles are also great for developing real-life, problem-solving skills!

Students learn to carefully analyze each Mind Benders® story and its clues, identifying logical associations between people, places, and things. The key is to make sure you get all the information out of each clue, by starting with the most obvious associations, then deducing the less obvious associations until everything finally fits together.

Step-by-step instructions and detailed answers are included. Puzzles increase in difficulty.
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