Curated OER
Matrix Madness!!
Perform operations to add, subtract, multiply and divide matrices. Then solve problems with vectors using matrices. A three day lesson: Matrix Madness, Mystical Matrices, and Decode the Encode. The last lesson has prizes that the class...
Curated OER
Secret Messages and Matrices
Young scholars 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
Clock Arithmetic and Cryptography
Learners investigate modular clock arithmetic and cryptography. They perform basic operations in modular (clock) arithmetic and encode and decode messages using simple shift and affine ciphers.
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
Math: Number Systems
Pupils examine other number systems, particularly the binary number system. They discover how to convert from decimal to other base systems. Students analyze the advantages and disadvantages of using the coded decimals.
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...
EngageNY
Using Matrix Operations for Encryption
Data encryption is an important security measure for sensitive data stored on computers. Pupils learn how to utilize matrices for creating code. They also get a great review of matrix multiplication, inverse matrices, and the identity...
Curated OER
Problem Solving Model
Use a vocabulary chart to introduce math functions. The class defines a list of mathematical vocabulary terms on a worksheet, as well as completes equations and expressions. They examine word problems and practice transcribing them into...
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...
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.
Illustrative Mathematics
Adding Tenths and Hundredths
Learning to add fractions with different denominators presents a big hurdle for many young mathematicians. Simplify the process for learners with this series of practice problems involving the friendly fractions tenths and hundredths....
Curated OER
SHHH It's a Secret
Students rewrite word problems using expressions and equations. In this algebra activity, students use the correct variable to solve and write equations. They use the TI to graph their solution.
Curated OER
Secret Sharing with Linear Equations
Learners 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 teacher.
Curated OER
Cryptography on the TI-83 Graphing Calculator
Students explore the history of cryptography. They assess function notation and transformation, matrix operations, and the fundamentals of modular arithmetic. Using graphing calculators, students develop their own encryption schemes.
Curated OER
The Rotating Grille
Students experience the geometric method of coding by actual construction and use of a rotating grille. Students use rotations and reflections to code and decode messages. Students explore nomenclature and symmetry.
Curated OER
Cryptography Implementation
Learners explore cryptology. They write a research paper on cryptography. Using linear equations, students invent a code and write a secret message. Learners complete cryptography puzzles.
Curated OER
Theory of Codes
Students explore the concept of code theory. In this code theory lesson, students discuss noise, error correction, Hamming distance, parity check matrices, and cyclic codes. Students develop these concepts through practice and discussion.
Curated OER
Clock Arithmetic and Cryptography
Students explore the concept of modular arithmetic and cryptography. In this modular arithmetic and cryptography lesson plan, students use applets to explore modular arithmetic using a clock and Caesar Ciphers. Students exchange their...
Curated OER
Teaching Radicals in Less Than Five Minutes
Students simplify complex radicals following a specific technique. In this math lesson, students simulate the process using several decks of cards. They explore real life applications of radicals.
Curated OER
Basic Crypto Systems
Students try to solve codes mathematically. The use of a code needs a key. Students try to decipher a code with a mathematical key. This requires focus and higher order thinking skills like analysis.
Google
Google for Education: Ciphering a Sentence
In this lesson, the students have a goal to map each alphabet letter to a number in the range 1-26. They use some simple rules to create this mapping and then use this mapping to encode a sentence.
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