Math = Love: Rational Expressions Question Stack

Thursday, November 19, 2015

Rational Expressions Question Stack

Sorry my posting has been so sporadic of late.  It turns out that teaching, grad school, and wedding planning is waaaaaaaaaaaay more than a full-time job.  Today, I want to share another self-checking practice activity I made for my Algebra 2 students.  It's a Question Stack to practice simplifying and adding/subtracting rational expressions.

Here's a quick overview of how a Question Stack works:

  • Lay out all of the cards with the answers facing up.
  • Flip over one card to reveal a question.
  • Work that question out.  
  • Find the answer on another card. 
  • Flip that card over and lay it on top of the first question card to start a stack of questions and answers.
  • Work the new problem that was just revealed.
  • Repeat until you run out of cards. 

I have my students work through these in groups with mini dry erase boards.

This was very hastily put together because 1) I am a procrastinator and 2) I have first hour planning period.  That is NOT a good combination.  So, if it bothers you that I copied and pasted some questions and typed others, I apologize.  If your kids are super astute and will notice the font differences, you should probably fix this.  My kids were so stressed out about rationals that they didn't seem to notice.  

I put a Q on the question side of the cards to avoid confusion.  I still had one group waste a lot of time trying to solve a problem.  They couldn't figure it out.  I couldn't figure out why it wouldn't simplify.  Finally, I realized that they were looking at the answer side of the card that was already simplified.  The rest of the class gave them a whole lot of grief over that!  

Here are the questions I used:

And, here are the answers.  The cards do not print with the question and answer on the same card when printed double sided.  This is by design.  The cards should form a sort of loop.  

Download the file (PDF or Publisher) here.


  1. Wedding planning is no joke--it always takes up so much emotional and organizational effort even if you want something simple!

    1. Yes! We're doing everything super simple. Our problem is we still don't have an exact date because of visa stuff. So, we can plan, but we can only plan so much right now.

  2. UCLA email us Face book as Twitter us I were always available thank you that in German means time and Gist means the mind or ghost or spirit and it 70-246 practice test should have been capsulate the spirit of the times we don't quite have it in with your call and it talks about all there is a job talked about how there is a on a row were .

  3. that I will explain later first of all I showed you that just without memory buffer I got Brain Plus IQ universal architecture you are suggesting that protection issuances different architectures different type of computer you national travel computer is brought can

  4. Love this! And I'm glad to hear I wasn't the only one that tackled all 3 things at once (got married last April and finished my master's last May). You'll do great and everything will be awesome!

  5. Hey Sarah! I love using your activities in my class. I used this today and I think there is an error. My students suggested that the answer printed as (x-1)/(x+2) should be (x+1)/(x+2)

    Could you look at this?