## Monday, June 11, 2018

### Hands-On Fibonacci Sequence Explorations: Combining Logic, Math, and Art

I've realized that much of the hands-on math enrichment that I offer the kids is "number sense"--helping to develop their intrinsic understanding of numbers, their flexibility with them, their pattern recognition of number relationships. Whether it's fractions or geometry or exponents that we're studying, I always see space in their curriculum where free exploration can make kids wiser in what they're studying.

In algebra right now, Will is studying proportions and ratios, so what better time to spend some more time on the Golden Ratio?

I introduced the kids to the basic concept of the Fibonacci Sequence and how it's calculated, then asked them to use each number in the sequence as one side of a square. They were to draw those squares on 1cm graph paper, color them in, and cut them out. I told them that they should stop only when the next square would not fit onto a single piece of graph paper, although if we did this project again, I'd tape together larger sheets of graph paper ahead of time so that they could extend the sequence further.

Here's one of the sets that the kids came up with:

Apologies for the poor lighting in these photos, but school gets done on rainy days as well as sunny!

You can make lots of pretty patterns with just these squares:

And yes, I DO think that Fibonacci Sequence stacking blocks would be AWESOME!

Next, I told the kids that these squares of the Fibonacci Sequence are also a puzzle, and I challenged them to use all of their squares to make a rectangle. They're familiar with this idea from the pentominoes that we've played with.

Here is Will's rectangle:

And here is Syd's!

The kids did not confer, so I think it's interesting that both built their rectangles the same way, and neither happened upon the "spiral." In fact, when I later rearranged the pieces to show the spiral, Syd still didn't really see it. This is where more and larger squares would have helped by extending the pattern.

I took away the larger squares, and had the kids solve the puzzle to make a rectangle with only the three smallest:

Then I added the next piece, and again asked them to solve the puzzle:

Do this again and again, and you see how the pattern can be formed:

Beautiful, isn't it?

In related news, we were at the US Space and Rocket Center last week for Will's Space Camp graduation (more on that another time!!!), and in their museum, look at the display that we found!

It was particularly terrific because it extended the pattern for us to see!

I didn't look at any additional resources with the kids until after they'd worked the "puzzle," because I didn't want them to see a solution, but later in the day we watched these two YouTube videos from two of my favorite YouTube channels:

Here are some other great Fibonacci resources that we've been exploring:

And here are some more ways to explore the Fibonacci Sequence in logic, math, and art:
This project gave inspired me to come up with some more extension ideas just for me. I think it would be really cool to design a large-format squares of the Fibonacci Sequence, print it, and glue it to foam board the way that Matt and I did with the decanomial square. Imagine how many more interesting patterns you could come up with. I also deeply need to sew a Fibonacci sequence quilt.

As if I don't already have enough dream projects on my to-do list!

#### 1 comment:

Gregory Anderson said...

Thank you. I've not found such a page of fun regarding Fibonacci. I just love the links between what we find appealing in art, in our reasoning, and in our equations.

Keep on keeping on.
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