Who Killed Mr. Xavier Pression?

I just got back from AMLE 2016, and what an amazing experience.  I met some amazing people, including many that I've been talking to during #MSCHAT and #TLAP talks.  I know many of you want to hear all about it, but honestly this graphic kind of explains where I am currently at:

I think I need to install some new RAM.

So for now you'll have to read about my latest activity.  

This year my 7th grade math class has been immersed in a game world.  They are in guilds named after mathematicians (Kepler, Nother, Euler, and Brahmagupta), exploring a world, and helping to bring together two nations.  They were introduced to Mr. Xavier Pression, the main diplomat brokering the truce between the nations of Gunthar and Sancrist.  Last week they received a message that Mr. Pression has gone missing.  They completed a series of quests to find him, which all four guilds did successfully.  

Unfortunately at the end of the last quest they found this on the screen at the end of the period:

It took a minute, but they eventually got the pun.

There was shock on everyone's face.  He was dead? How could that be?  They did everything they could to find him.  The next morning they walked in determined to find his killer.  

I purchased this activity from Teachers Pay Teachers.  It is a clue-based activity to have students write algebraic sentences as expressions.  In fact the whole game is set up like the boardgame Clue.  Here is the link to the product - I highly recommend it: Who Killed Mr. X. Pression

Now here is where Dave Burgess would say it is time to kick it up a notch.  They could have just come in and done the activity. I could have had the worksheets with the clues out and they could have just completed them and discovered the person, place, and thing.  However, this was a murder mystery. This was drama.  This was a crime investigation.  So instead of coming in to a worksheet laden room, they came in to this:

SO much positive feedback about the atmosphere.

Dark room, chilling music, the only thing out was the title.  By the way, students were actually working when I shot this video - that's the murmuring you hear in the background.  There was so much excitement and chatter.  They wanted to finish this assignment.  They learned that their sponsors were offering rewards including kingdom points, renown points, and new items to anyone that correctly completes the problems and solves the mystery.  They begged to get it started. 

How often can you say that has happened while teaching writing algebraic expressions?