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...
Florida Center for Reading Research
Word Steps
Blending basic CVC letters to make words is one of the first steps to independent reading. Provided here are several images of stairs and several letters to cut and arrange. The learner rearranges the letters to form CVC patterns, sounds...
Meadows Center for Preventing Educational Risk, University of Texas at Austin
Lesson 15 - Soft G and Soft C
The names Cindy and Carrie start with the same letter, but have very different sounds. The 15th of 17 word recognition lessons focuses on the soft C sound found in Cindy and the soft G sound found in Gene. Direct instruction starts with...
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
Binary and Communication Systems
Students participate in an activity that introduces them to the concept of binary coding as a language. They decode messages using special boards that has its own code for different letters. They create new codes by rearranging wires...
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
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...