Math = Love: Review Auction Game for Solving Equations (or any topic...)

## Tuesday, October 23, 2012

### Review Auction Game for Solving Equations (or any topic...)

Well, after attending the Global Math Department's meeting over favorite review games, I knew I had to try out Alisan Royster's Review Auction idea.

Setting: Day before Solving Equations Test in Algebra 1

I made up a worksheet with 2 columns.  The left column had 10 equations to solve.  The right column had 10 answers.  Some of the answers were correct.  Others weren't.  I gave the students time to solve each equation and decide whether my answers were correct or incorrect.  This was much harder for them than expected.  When I gave them the answer, they didn't know what to do.  They felt like they had to use that piece of information somehow to solve the problem.  After a few reminders that we were still just trying to get the variable by itself, the students caught on.

Depending on the class size, I broke the class into groups of 3 or 4.  Announce that we are going to have an auction.

Present each group with their own paddle to bid with.

Yes, every one will want to be the one to hold the paddle.

Each group gets \$1,000.

In their group, the students need to compare their answers.  What questions have the correct answers given?  Which answers were incorrect?

The goal of the review game is to be the team that purchases the most correct questions.  Purchasing an incorrect question will cause you to lose an additional \$500.

If there is a tie, the team with the most money left over wins.

The auction starts.  Each group decides how much they want question one.  Debates ensue over whether the answer I gave was correct or not.  Students disagree.  Decisions must be made.  This is a fast-paced auction, after all.

After all the questions have been auctioned off, we worked out each problem on the Smart Board.  We counted up how many correct questions were purchased by each team.  Yes, there will be the teams that spend almost all of their money on one question.  Then, there will be the teams that are too frugal with their money and end up with lots of money and only a single question in their possession.

Winners were crowned.  Tootsie Rolls were distributed.  Fun was had by all.

One student claimed that she helped her team win because she used to work at an auction house.  Another student came up to me after class and told me that he learned his team's winning strategy by watching Auction Hunters.

Here is the review auction sheet I used for solving equations.  One of my wrong answers actually fooled some students.  It highlighted a very common mistake.  My other wrong answers, however, didn't fool a single student all day long.  But, I guess that's okay because it means my students knew how to solve equations.

1. We're trying this tomorrow! I can't wait!

2. I loved this so much when I used it for solving equations and inequalities, that I'm reviving it for systems of equations tomorrow. I recently watched the movie North by Northwest and there is this great clip of an auction, where Carey Grant does not follow the rules of auctions. I thought it would be great to share right beforehand http://youtu.be/dl0JcK4-Dx0

1. You are brilliant. I'm definitely using the video clip next time I do this activity!

3. Getting ready to try this today. I love this idea. I will let you know how it goes. Thanks for sharing!

Ms. Lewis

1. The kids loved the activity. They were a little hesitant at first, but once they got started they did well. They were really watching their money.

Ms. Lewis

4. Do you still have this auction sheet? It's not appearing on the page. I love this idea and would like to try it :)

1. You may need to make sure you have flash/shockwave installed in order to view the file. If you still can't get it to work, please send me an e-mail. And, I will be happy to forward it to you!

5. Love this! I'm going to use it tomorrow, and I'm going to show this clip of an auction championship first. :) http://www.youtube.com/watch?v=Ea7gn8hhEFA

Thanks!

1. Showing a clip of an auction is an amazing idea! Thanks for sharing!

6. I did this in my classroom today and the kids loved it. I try to spend a whole day just on checking equations. This paper allowed them to practice the skill of checking even with types of equations we haven't covered in class. (variables on both sides) This was the perfect activity because they had to practice the three steps of writing the equation, substituting the solution, and seeing if they got the same number on both sides. The auction part was a blast! I even modified this activity for my other class and gave them answers from a multiple choice test. They had to buy the answers that were correct. Thank you so much for sharing!

1. I'm glad to hear that you and your students enjoyed the auction!

7. Do you have a copy of the equations you used or the auction worksheet? I would like to try this tomorrow!

1. The worksheet is uploaded at the bottom of the post. You may need to have Flash/Shockwave installed in order to view it. If you can't get it to load, e-mail me. I will be happy to attach the file and send it to you.

8. Just tried this in class - awesome! Loved how it made them "talk Algebra" in their groups before we auctioned. Thanks for the worksheet - I tweaked it a little to what we were learning but the concept is awesome!

1. This is GREAT to hear!

9. I adapted this idea and have used it a couple times this year (for identifying functions and for Domain/Range).
I shot a table, set of ordered pairs, or a graph on the board and had the students decide if it was or was not a function. They showed me that side of the paddle. Then I randomly chose one student who had it correct to explain why. With the domain/range activity I put up a graph and either the domain or range of that graph. They had to decide which one I was showing them.
I was a little nervous at first that my students would club eachother over the heads with the paint stir-sticks, but they were awesome. All 3 times I've pulled them out we have gone through the slides I've made and they ask me to come up with more on the spot. This was ingenious!!

1. Very cool, Angela! Thanks for sharing!

10. I love this idea! We've played Bingo and Kahoot to review and I am looking for something different. How did you start the auction? Did you start with \$100 for the first problem? And in what increments did you go up? How did you take away the \$500 when they bought the wrong answer- at that time or at the end? Thanks.

1. I gave each group a set amount of money to start with, but I don't remember how much it was. Just make the starting amount and increments work with each other, and you'll be fine. The \$500 was taken away at the very end.

11. I totally did this today with my 7th graders. I was terrified about how I would explain it to them and how they would react. They loved it!! Once they got the hang of bidding, it got a little crazy. If I'm going to change anything, it will be to have a smaller number of groups. I had 5 and that made things a little crazy. I have smaller class sizes, so I think I can get away with 3 or 4 groups with more members.

Thanks for this awesome idea! It was a great way to start the first day of the new semester!

12. Hi - Do you by chance have the answers to the equations? I am doing some stuff on a v volunteer basis for my son't school. so am not a "real" math teacher and want to be able to check my own work! Thank you. I love the idea. Nicki