Curated OER
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.
Computer Science Unplugged
You Can Say That Again! – Text Compression
Compression, the process computers use to store information, is the focus of a resource that presents two different stories that describe the concept of compression by eliminating repeated letters and replacing them with a pointer. The...
Curated OER
Short Vowel A: Secret Code
In this short vowels learning exercise, students use the secret code box to help them spell some short "Aa" words. Students then draw a picture of the word.
Curated OER
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.
Curated OER
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.
Balanced Assessment
MasterMind
Knowledge of statistics and probability can increase your advantage when playing games. The activity asks learners to analyze the game of MasterMind to determine the number of possible codes. They also examine different variations of the...
Curated OER
Code Fun
In this code fun activity worksheet, students decode a secret message using the symbol code key provided at the bottom of the worksheet.
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.
Curated OER
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.
Curated OER
Squigly's Special Message- Playground Fun
In this language arts instructional activity, students solve a secret message by first reading 24 clues and fitting the answers into the puzzle grid. All answers have 4 letters, one of which is given as a hint.
Peter Bunzl
Cogheart and Moonlocket
Peter Bunzi takes readers to the Victorian era with two stories, Coghaert and Moonlocket. Accompany the literary time warp with a companion packet that offers a plethora of exercises. Learning opportunities include activities for before,...
Curated OER
Alchemy and Chemical Symbols
In this alchemy activity, students read about how alchemists kept their experiment notes in secret code. Students design their own secret code for the given elements. This activity has 2 problems to solve.
Curated OER
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.
Curated OER
Fifty Dollar Word$
In this proving words have an exact value of $50 worksheet, students use the "Secret Coded Letter Values" to encode each word and use any math operation in any order or combination. Students encode 5 answers.
Curated OER
Goldentail's Rounding Railroad
In this number puzzle worksheet, students solve 24 equations in each of two sets of multiplication and division problems. They circle each answer and round them to the nearest whole number. They use the secret code that is shown in a box...
Curated OER
Vowel Sounds -- Short Ee Words
For this letter and number recognition worksheet, students use a secret code box to help them spell 20 short Ee words.
Bowland
German or English?
Sprechen sie Deutsch? Future cryptographers must decide whether an unknown text is written in English or in German. They use provided pie charts about the frequency of words in the English and German languages to help make their decisions.
Curated OER
Uncovering Underground Veggies
Add a word puzzle to your underground vegetable lesson plan. Learners unscramble vegetable names and discover a hidden message using corresponding numbers and letters.
Curated OER
Fifty Dollar Word$ From Ms. Smiley's Class
For this math code worksheet, 5th graders analyze 6 words that have an exact value of $50 according to the code. Students encode each word using the values in the key and use any of the four basic math operations to show a final value of...
Curated OER
Fifty Dollar Word$
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.
Curated OER
Discover the Secret Word
In this phonics worksheet, students investigate the beginning letters of words by examining 6 pictures. Students say the name of the object then choose the beginning letter and circle it. The circled letters will form a secret code word.
Curated OER
Discover the Secret Word 2
In this phonics worksheet, students examine 6 pictures and say the word names. Students circle the correct beginning letter. The circled letters will then reveal a secret code word.
Curated OER
Discover the Secret Word
In this phonics worksheet, students examine 8 pictures and 4 letter choices. Students say the name of the picture and circle the correct beginning letter. Students use those letters to solve a secret code.
Curated OER
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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