Houghton Mifflin Harcourt
Challenge: Code Breaker
Here is a code-breaker multiplication and division game which has learners find the missing letter in equations, then solve and use those letters to "break the code," which actually is the answer to a riddle. Make math fun with a...
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Secret Code Message 2
In this letter and number recognition worksheet, students use a secret code box to help them spell 4 short Ee words. Students then draw pictures of the words.
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Basketball Addition Puzzle
In this math activity, students solve 25 basic addition facts below 20. Using the sums and the key to the code, students decipher a secret message about basketball.
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Baseball Word Puzzle and Addition Facts
In this math worksheet, students solve 25 basic addition facts below 20. Using the sums and the key to the code, students decipher a secret message about baseball.
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Abraham Lincoln Addition Puzzle
In this math worksheet, students solve 50 basic addition facts below 20. Using the sums and the key, students decipher the secret message about Abraham Lincoln.
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George Washington Addition Puzzle
In this math learning exercise, learners solve 45 basic addition facts. Using the sums and the key to the code, students will decipher the secret message about George Washington.
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Caesar Ciphers: An Introduction to Cryptography
Students brainstorm and discuss the concept of cryptography, the science of secrets in today's world and then focus on a system for sending secret messages used by Julius Caesar. They make a Caesar wheel assessing encrypting and...
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Patterns of Communication
Scholars examine codes, symbols, and other forms of communication. They discuss Morse Code. Next, they are given messages written in code, which they must decipher.
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Patterns and Pentominoes
Students solve pentomino puzzles. In this problem solving lesson, students discuss how pentomino puzzles play into the plot of Chasing Vermeer by Blue Balliett and practice solving a pentomino puzzle on their own....
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SHHH It's a Secret
Students rewrite word problems using expressions and equations. In this algebra lesson, students use the correct variable to solve and write equations. They use the TI to graph their solution.
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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 Message
Students practice identifying fractional parts represented in pictures and phrases. In this fraction lesson, students determine the proportion represented by common time and money phrases such as "3 hours in a day". Students match their...
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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.
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Addition Facts (Chinese New Year Puzzle)
In this math worksheet, students solve 15 basic addition facts with sums up to 20. Using the answers and the code key, students decipher the secret message about Chinese New Year.
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Multiplication Maze
In this multiplication maze instructional activity, students solve 6 multiplication numbers as they work their way through a maze gathering clues to decode a secret message.
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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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.
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Minnesota Muskrat's Worldwide Adventures
In this long division worksheet, 5th graders solve problems to decode a secret message. Students solve for 60 problems with some remainders and two digit quotients.
Teach Engineering
Basically Acids
Base your lesson plan on acids and bases on an informative resource. The first installment of a five-part module on the science behind Harry Potter has individuals investigate acid/base chemistry with the use of invisible inks. They also...
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Create Your Own Coded Language
Students discover and identify cryptology used in everyday life. They decipher or crack codes. Students create their own secret writing or coded messages, and develop a dictionary of eponyms. They discuss how they have already...
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Secret Code
In this division worksheet, 4th graders solve the 11 division equations and then match each number in the message with the division quotients. Students determine the message.
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Secret Code Math
In 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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Cryptography and Cryptanalysis
In this cryptography and cryptanalysis instructional activity, 8th graders read the explanation and example for codes and ciphers, then answer 2 questions and decipher 2 messages.
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Signal Corps
Students examine the role of signal corps during the Civil War and explore the technique of 'wigwag.' In this Civil War lesson plan, students discuss the way they communicate long distance today, they research how a civil war soldier...