Curated OER
Secret Code
In this multiplication worksheet, students complete multiplication problems containing numbers 1 through 12 and create a secret code at the end. Students complete 21 problems.
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
Multiplying Decimals
In this mathematics instructional activity, students find the answer to each problem by multiplying the decimals properly. Then they decipher the secret code using the letters and punctuation next to each answer.
Little 10 Robot
Operation Math Code Squad
Your mission, if you decide to accept it, is math skills practice. In this app, Mission Impossible meets basic number operation skills, and your students are the secret agents.
CK-12 Foundation
Addition and Multiplication Properties with Real Numbers: The Secret of Subtraction
An interactive boosts mathematicians' knowledge of subtracting integers using a horizontal number line by way of multiple-choice, true or false, and discussion questions.
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...
Curated OER
Coded Messages
Students 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.
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 Code
In this multiplication worksheet, 4th graders solve the 18 multiplication equations and use their answers to determine the code for the secret message.
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...
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...
Curated OER
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.
Curated OER
You Know the Answer: Math Riddle
Although the riddle is an outdated political reference, this math challenge is a good practice in operations and domain-specific vocabulary. Learners complete 18 problems, using multiplication, division, subtraction, and addition. Some...
Curated OER
Clock Arithmetic and Cryptography
Students perform basic operations in modular (clock) arithmetic. Students encode and decode messages using shift and affine ciphers. Students apply their multiplication, division, addition, and subtraction skills.
Curated OER
You Know the Answer
In this problem solving instructional activity, 4th graders are given an answer to a question and must solve the mathematical problems to discover the secret question. Students solve for 18 problems using addition, subtraction,...
Curated OER
Welcome to the First Day of School!
Classmates participate in a variety of getting-to-know-you activities for the first day of school. They make resolutions, become detectives about their fellow classmates, learn about each other by playing switch, and make welcome bags.
Curated OER
Learning to Hate Math
Give your class a different kind of reading assignment with the text included here. Anne Miller's essay "Learning to Hate Mathematics" details a hatred of math that grew from early childhood and still haunts the author today. After...