Lesson Pages:

### Lesson Information

##### Standards, Description, & Download

**Grade: **6-8**
**(depends on complexity of expressions and equations students are asked to create)

**Standards: **7.EE.4, 6.EE.2, 6.EE.7

**Description:** Students change messages into codes using algebra, and then crack the code to find out what the message says. This a very basic introduction of how algebra enables the process of encryption. Students will utilize the concepts of substitution, algebraic expressions, and solving 1-Step, 2-step or multi-step Equations to accomplish this.

Woo-hoo! My very mathaphobic son just said this was cool!

That is epic, and makes it all worth it! Thank you for letting me know!

I just used this lesson in my class again this year. Students had a good time. I improvised a little bit to make it new and did the following:

I had the students put their “key” and name on a piece of paper, crumple it up, and throw it in a corner of the room. Then the students had to race to find their partners crumpled up paper, find it, return to their seat and crack their partner’s code. It added a fun race element that the students liked a lot.

I also had my two honors classes (I teach 2 honors and 2 regular this year) as an extension write a story that would use encryption and then incorporate the process into the story to show how its done or create a creative flow chart that shows the steps to encrypt and decrypt a message.

If the above doesn’t make sense then you need to read the lesson or watch the video and it will!

-Matt

I can’t download any of this

I cannot download any thing on this lesson.

Thanks guys! Everything should be good to go now as of 5/29/12 4:40 eastern. Just switched the whole site over to a new look to prepare for the additions I’m going to make to the site, and this lesson didn’t save the changes – but anyway… It’s good to go now. Take care and thanks again for the heads up!