Computer Science Unplugged
Count the Dots – Binary Numbers
Did you know you can send a message using only zeroes and ones? This interactive resource presents an introduction to binary numbers. Through code cards, pupils learn to convert binary numbers to decimal numbers.
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Mystery Code
In this fractions secret code worksheet, students solve 9 problems that require them to add and subtract using fractions. Students use their answers to decode a mystery message.
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Secret Code Math
For this math worksheet, students solve the problems in the box grids with the operation of addition. The answers are used to create a secret code message.
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Coded Messages
High schoolers solve matrices by multiplication. In this algebra lesson, students create coded messages and relate it to solving matrices. They multiply and find the inverse of matrices.
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Shh... It's a Secret!
Fifth graders examine a series of rules for deciphering a code. They create their own secret message using a code after watching video. They access a web site to practice their decoding skills.
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Add 2-Digit Numbers in Different Ways
In this solving addition word problems worksheet, students use secret code cards and counters to problem solve. Students solve six problems.
Bowland
German or English?
Sprechen sie Deutsch? Future cryptographers must decide whether an unknown text is written in English or in German. They use provided pie charts about the frequency of words in the English and German languages to help make their decisions.
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Squigly's Secret Easter Code
In this math worksheet, students practice solving the code in order to decipher a secret message that is based upon the theme of Easter.
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Fifty Dollar Word$
In this proving words have an exact value of $50 worksheet, students use the "Secret Coded Letter Values" to encode each word and use any math operation in any order or combination. Students encode 5 answers.
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Goldentail's Rounding Railroad
In this number puzzle activity, students solve 24 equations in each of two sets of multiplication and division problems. They circle each answer and round them to the nearest whole number. They use the secret code that is shown in a box...
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The Code
In this the code worksheet, students study, review and calculate which of six codes is the correct one to enter a computer with a top secret scientific breakthrough in it.
Code.org
Public Key Cryptography
Investigate how public key cryptography works. Scholars continue their study of one-way functions and asymmetric keys and apply this information to public key cryptography. They use an app to explore public key cryptography and its...
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Fourth of July Addition and Subtraction
What is Thomas Jefferson signing? Focus on American history with this cross-curricular math puzzle. Learners utilize addition and subtraction skills to solve the mystery of the Fourth of July. All numbers are 3-digit, and there are no...
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Secret Code
For this multiplication worksheet, 4th graders solve the 18 multiplication equations and use their answers to determine the code for the secret message.
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Fraction Subtraction Code Breaker
In this fraction subtraction code breaker worksheet, 5th graders solve 11 fraction subtraction problems with common denominators, then use the answers to break the code.
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Help the Ghost!
In this secret code worksheet, students help a ghost fill in the blanks of a secret code from an alphabet code list to figure out what time it is.
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Matrices: A Secret Weapon
Students perform operations with matrices. In this algebra lesson, students use cryptography and cryptanalysis to solve problems. They add, subtract, and multiply matrices.
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Fifty Dollar Word$ From Ms. Smiley's Class
In this math code worksheet, 5th graders analyze 6 words that have an exact value of $50 according to the code. Students encode each word using the values in the key and use any of the four basic math operations to show a final value of...
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Fifty Dollar Word$
In this math code worksheet, students analyze 6 words that have an exact value of $50. Students encode each word with numbers from the key and use any of the four math operations to show a value of $50.
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Secrets and Spies
Students explore the lives of spies. In this secret government agencies lesson, students visit the Imperial War Museum and the Essex Secret Bunker online or in person to discover details about Britain's spies and secret bunker.
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Cryptography and Cryptanalysis
In this cryptography and cryptanalysis worksheet, 8th graders read the explanation and example for codes and ciphers, then answer 2 questions and decipher 2 messages.
K12 Reader
Geometric Shape Names
Combine math and language arts in the same lesson with a reading passage about number prefixes in geometric shapes. After reading several short paragraphs about the different prefixes used in shape names, kids answer five comprehension...
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Solving Single-Step Word Problems
Math wizards learn the five-step plan to solve math word problems. They investigate the five-step process for solving word problems, and examine the use of code words for each of the operations and solve a problem using the strategies.
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Now Showing: Reel Reduction
In this fraction puzzle practice worksheet, students put their problem solving skills to use as they solve a secret code by adding and subtracting fractions.