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:

1. 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!
2. Each groups tries to solve the problem written on the envelope, making sure each member in the group understands how to do the problem.
3. 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.
4. I use real coins. I let the winning team keep the coins if they want to.
5. 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,