Image of the Week: Seeing and Extending Coin Patterns

Seeing and Extending Coin Patterns

Have a look at the image of the week: What patterns do you see? You might first notice that there is a structure to this arrangement of coins. You might count the coins in the center and one each of the four arms, decomposing the structure into symmetrical components. You might also notice along the way that there are different types of coins here: pennies, nickels, and dimes. The type of coin then becomes part of the overall pattern and structure. Here is just one way you or your students might decompose the structure into pieces of a larger pattern:

Just noticing and naming these – and any other – patterns is valuable mathematical work. But consider the ways that you might extend this activity. If you teach older students, you might invite them to see this image as the first case in a sequence of growing coin arrangements.

• How could you extend this pattern?
• What could Case 2 look like? Case 5? Case 10?
• If students are intrigued by the values of the coins, you could ask, What could the value of Case 2 be? Why? How does the value grow with each new case?

As always, you can use this image as an entry point for students to create and investigate their own coin patterns. What patterns might they make? Students could create, share, discuss, and compare their own coin pattern images. You could spend days on this idea alone. Try this – or any of our coin pattern activities – with your students tomorrow.

For our international teachers: It is not necessary for students to know the coin values in this image to begin to notice patterns. Give this image a try and use it as a springboard to having your students construct their own coin patterns with coins from your nation. We’d love to see what they create!

​To multiplicity, cheers!

Jen Munson and the multiplicity lab group