This game is a fun way to practice word problems for systems of equations. I usually have my students play the game in math 051 or 056 *after * learning systems of equations. It makes a great test or quiz review game.

How to play:

- Pass out envelopes with coins inside. Each envelope has an algebra problem on it. I like to have every group do the same problem at the same time, so I warn them not to talk too loudly about the problem that they get!
- Each groups tries to solve the problem written on the envelope, making sure
*each*member in the group understands how to do the problem. - Once they think they have solved the problem, I let them open the envelope while I watch *if* every person in the group understands the problem.
- I use real coins. I let the winning team keep the coins if they want to.
- The best part is the bonus round, where teams make up their own problems for another team to solve.

Here are some examples of the problems I use. Or you can go to the word file, coin-game.

**Do NOT Open the envelope until you have solved the problem!**

This envelope contains pennies and dimes.

The number of pennies** IS** 6 more than the number of nickels.

The total amount of money in the envelope is $0.50.

If you solved the problem correctly, **KEEP** the money. If you did not solve it correctly, GIVE BACK the money.

Either way, go on to the next envelope!

**Do NOT Open the envelope until you have solved the problem!**

This envelope contains pennies and nickels.

The total number of coins (pennies and nickels) **IS** 15.

The total amount of money in the envelope is $0.35.

If you solved the problem correctly, **KEEP** the money. If you did not solve it correctly, GIVE BACK the money.

Either way, go on to the next envelope!

**Bonus Round – Double your money!!!**

**Put some of your money in this envelope, and write a word problem for it, here:**

This envelope contains _____ and ________.

The….

The total amount of money in the envelope is ______.

**Give the envelope to another group.**

If the other group solves your d the problem correctly, you get **double the money you gave them, **