Letter Sudoku Puzzle Logical Reasoning for Kids

Computational thinking is a new way of problem solving that involves thinking about a problem in a way that can be solved by using computing tools like logic, decomposition, abstractions, algorithms, patterns, data collection and analysis, and simulation or modeling.

Computational thinking can be used to solve problems in almost all areas of our lives and helps kids develop some pretty great life skills that can apply to a variety of situations. A computational thinker approaches problems by:

• Experimenting and playing to solve a problem that might have more than one possible solution
• Working together with others to reach a common goal
• Persevering when faced with a difficult problem
• Finding and fixing errors in complex problems
• Designing and making solutions for open-ended problems
• Understanding their own strengths and weaknesses

How to Play Letter Sudoku

This activity is most effective when it is modeled by an adult or older sibling before starting. For example, solve one block space and explain why the square can’t certain letters. Repeat the process for columns and rows as well as squares. Use the following rules to reference when modeling your logical reasoning.

1. Each letter can only appear once in each row
2. Each letter can only appear once in each column
3. Each letter can only appear once in each 2X2 or 2X3 block (depending on the worksheet you are using).

Use an Algorithm to Solve Your Letter Sudoku Puzzle

An algorithm is a series of instructions to solve a problem. Begin with teaching the rules of Sudoku. You can turn these rules into an algorithm that automates how you are solving each square. Repeat your algorithm over and over again. Think about how this process starts with a series of steps and evolves into a program that is written for a computer to automate a task. Sudoku like a robot! For example,

1. Choose square
2. Check row for letters
3. Check column for letters
4. Check box for letters
5. Determine answer

Use Decomposition to Simplify Your Letter Sudoku Puzzle

Decomposition is the process of breaking down a complex problem into smaller, easier to solve, pieces. Focus on each 2X2 or 2X3 block of letters. Try to solve each square by using the letters in the block and following rule #3.

Another way to use decomposition (my personal favorite!) is to work on one letter at a time. For example, start with the letter A and work your way through the rest of the letters.

Use the letters A through D to solve this Letter Sudoku worksheet with your preschool through 3rd grade kiddo. Remember to model the logical reasoning process. For example, solve one block space and explain why the square can’t be certain letters.

Repeat the process for columns and rows as well as squares. Use the following rules to reference when modeling your logical reasoning.

The worksheet download contains printable letter pieces that you can cut out to use again and again with your puzzle as well as an answer sheet.

We like to use dry erase pocket sleeves for all of our worksheets, so that we can reuse them for all of these kiddos I have running around this house.

Letter Sudoku for 3rd Grade to 5th Grade

Use the letters A-F to solve this Letter Sudoku puzzle. This worksheet is made for kids in 3rd grade through 5th grade and can also be used by younger experienced Sudoku players. 

Remember to model the logical reasoning process. For example, solve one block space and explain why the square can’t be certain letters. Repeat the process for columns and rows as well as squares.

Use the following rules to reference when modeling your logical reasoning.

1. Each letter can only appear once in each row
2. Each letter can only appear once in each column
3. Each letter can only appear once in each 2X2 or 2X3 block (depending on the worksheet you are using).

This workbook also contains letter pieces that can be cut out and used with this worksheet as well as an answer key.