For the Teachers
$1 Math
Captivate your class by having them find the value of their names, different zoo animals, musical instruments, etc.,with a mental math lesson. Using the coding formula listed, children learn to fluently estimate and calculate...
Curated OER
Secret Messages and Matrices
Students use matrices and linear equations to decrypt a secret message. They receive a part of the encoded message to decode by means of inverse matrices. Pupils write critiques about the activity.
Curated OER
Secret Message
In this division worksheet, students solve 8 basic division facts. Students then match their answers to the letter key and that will reveal a secret message.
Doing Maths
Converting Metric Measurements Code-Breaker
Can your scholars crack the code of this metric activity? To start, mathematicians must convert different units of measurement to the standard metric system form. Then, pupils plug in the corresponding letter to the correct answer to...
Curated OER
Secret Message - Division
In this secret message division activity, 3rd graders find the quotients in 6 division problems. They divide either one or two digit numbers by one digit numbers. They use the quotients to determine the letters that are placed on the...
Curated OER
Flow Chart Secret Code: What Should You Call A Cow That Lives in Alaska?
In this math code activity, students solve 10 multi-step problems using all math operations. Students start with the given number and perform each step in a flow chart format. Students take their total answer and decode the secret message.
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
Secret Code Spotlight
In this secret math code activity, students solve 14 equations and apply the color value for each line according to the key. Students write the final total and the secret coded letter from another key. Students read the message.
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
Secret Message: Missing Factors
In this missing factor instructional activity, students find missing factors in equations, then use a set of corresponding letters to find the "secret password." Answers are included on page 2.
CK-12 Foundation
Solving Equations Using the Pythagorean Theorem: Cryptography
Don't keep this resource a secret. Individuals learn to use the Pythagorean Theorem to find Pythagorean triples. They also see how Pythagorean triples can be useful in the field of cryptography to encrypt secret messages.
Curated OER
Secret Sharing with Linear Equations
Young scholars use linear equations to reveal a secret message. They practice writing linear equations from two ordered pairs. Students determine the y-intercept of the line from the equation. They reveal the secret message from the...
Curated OER
Secret Code
In this multiplication puzzle worksheet, students find the products to 18 elementary multiplication problems. They solve the code using the letters assigned to each product. They read the secret message.
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
Squigly's Secret Easter Code
For this math worksheet, students practice solving the code in order to decipher a secret message that is based upon the theme of Easter.
Curated OER
Holiday Math Mystery
In this Christmas math worksheet, students fill in each tree with the missing number to complete the addition problems. Students then use the missing numbers to find the secret message about Christmas.
Curated OER
Detective Digis and the Computer Caper
Mathematicians participate in an hands-on activity to investigate the binary number system and write messages in binary code and have classmates decipher the messages. A said video on the topic does not seem to be available, but the...
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...
Curated OER
Division Match
In this division worksheet, students solve division problems with decimals and match the problem to the answers. Students match 15 problems and solve a secret message in the end.
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
Coded Messages
Students solve matrices by multiplication. In this algebra instructional activity, students create coded messages and relate it to solving matrices. They multiply and find the inverse of matrices.
Curated OER
A Secret Code
In this addition and subtraction worksheet, learners solve for problems to complete the riddle about George Washington. Students solve 20 two digit problems of addition and subtraction with some regrouping necessary.
Curated OER
Holiday Math Mystery
In this holiday math mystery activity, students fill in fifteen missing numbers that makes each tree correct. Students then use the missing numbers in each tree to find the secret message shown.
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...