Curated OER
John Glenn Secret Message
In this John Glenn worksheet, students reveal a secret message by decoding the symbols to spell out the secret message. Students utilize the alphabet key to decode the message.
Curated OER
Secret Writing Devices
Elementary and middle schoolers explore the world of secret writing, otherwise known as cryptography. After an interesting introduction to the activity, learners utilize a decoder badge which uses the St. Cyr cipher - which is a cipher...
Curated OER
Christmas Secret Message Puzzle
In this decoding the message worksheet, students fill in the blanks using the letters that match each Christmas picture on the page. Students write 19 letters.
Curated OER
Winter Secret Message Puzzle
In this winter secret message puzzle worksheet, students solve the secret message by matching the pictures and letters in the code and writing the winter phrase.
Curated OER
Thanksgiving Secret Message Puzzle
In this Thanksgiving secret message instructional activity, students use a picture/symbol key given at the bottom of the page to decode a Thanksgiving message. A reference web site is given for additional activities.
Curated OER
Decoding Nazi Secrets
Learners practice decoding messages given the key. They continue to practice solving messages without a key. They must determine the best way to view the message. They examine secret messages during World War II.
Shodor Education Foundation
Caesar Cipher
Caesar ciphers hide secret missives. A simple interactive lets users encode and decode hidden messages. The cipher method here is the Caesar shift.
Curated OER
Fall Secret Message Decoder Puzzle
For this vowel and consonant puzzle worksheet, students decode the secret fall phrase by filling in the blanks with the letter that matches each picture from the box at the bottom of the page.
Curated OER
Fall Secret Message Decoder Puzzle
For this decoding worksheet, students decode a puzzle which makes fall pictures equal a letter. Students decode 13 letters to solve the puzzle.
Curated OER
Decoding Machine
Fourth graders use their decoding machine to find the value of their spelling words. Encourage partners to create a message for each other to decode.
Curated OER
Scatter Brain
Examine a coordinated geometry grid to decode the hidden message. Pupils write a coded message to their parents using letter coordinates from the grid.
Curated OER
Secret Codes
Learners practice writing and decoding secret messages before discussing DNA and its role as a code for making proteins. They translate DNA into RNA and identify the sequence of amino acids to find a secret message. An interactive...
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Decoding DNA
Third graders complete their KWL charts from the first lesson of the unit as a review for the summative. Then they decode a secret message using the four basic components of DNA, adenine, cytosine, guanine and thymine.
Curated OER
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.
Curated OER
Spring Picture Cryptogram Puzzle
In this early childhood cryptogram worksheet, students decode and solve a spring secret message by filling in the blanks with the letter that matches each picture from the box at the bottom of the page.
Curated OER
Caesar Ciphers: An Introduction to Cryptography
Students encode and decode messages using a Caesar Cipher. In this encoding and decoding messages using a Caesar Cipher lesson, students discuss cryptography and how it is used. Students make a Caesar wheel to encode and decode...
Curated OER
Magnetism-Decode Encrypted Statements
Third graders solve a cryptogram by decoding a message written with wingdings. In this decoding lesson, 3rd graders solve a message related to magnetism. Students have notes about magnets once they've finished.
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.
Curated OER
Halloween Decoding Puzzle
In this Halloween activity, students use the pictures to decode the words about Halloween. Students decode 3 words about Halloween.
Shodor Education Foundation
Spy Game
Turn students into detectives as they decipher encrypted messages. Introduce your class to modular arithmetic and have a little fun encrypting and decoding secret messages. The activity does not hit many content standards, but would be...
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Secret Codes
Students examine Morse code and how it is used. In this secret codes instructional activity students decode messages, make their own codes and have other students crack the code.
Curated OER
All Systems Go!
Secret codes are so much fun, and a great way to practice nearly any math skill. Let your class become code breakers as they investigate inverse matrices. They use TI-Nspire technology to solve systems of equations which help them crack...
Curated OER
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.
Curated OER
Cryptography Implementation
Students explore cryptology. They write a research paper on cryptography. Using linear equations, students invent a code and write a secret message. Students complete cryptography puzzles.