Showing posts with label problem solving. Show all posts
Showing posts with label problem solving. Show all posts

Thursday, May 10, 2018

Printable Pentominoes

In our kindergarten classroom children enjoy spending time working with math manipulatives 
that encourage playful explorations with shape in a variety of ways. One of our favourite tools are 
versatile pentominoes.

Pentominoes are polygons made of five, equal-sized squares connected edge-to-edge. There are twelve 
different pentominoes in one set. You can purchase pentominoes from educational resource stores, or 
print paper copies on card stock and laminate for children’s use here:https://bit.ly/2wtFt0d


There are many reasons why pentominoes are an essential math tool for any early childhood classroom. 
Pentominoes:

1. are gamelike in nature and promote a positive attitude towards math
2. encourage cooperation and collaboration among children 
3. Promote math thinking in a variety of areas including spatial reasoning (logic when solving
 puzzles, symmetry, reflection, rotation, design), measurement (considering the area and perimeter 
of designs), and number sense (counting the number of tiles or squares in a design, calculating the 
total number of squares using the anchor of 5)
 We have used pentominoes in many classroom activities. To see what we've done and follow our math journey, follow us on twitter @McLennan1977. Share your favourite pentomino activities in the comment section below!

Tuesday, March 7, 2017

The Mitten Measurement Task

It's amazing the kinds of questions children can ask...
 
One of my favourite books to read in the winter in "The Mitten" by Jan Brett. The story is appealing to young children who love to retell the text and marvel at how big the mitten grows as each animal squeezes into it.  This week I read the book again upon request by one of the children.  At the end of the reading one child shared that she felt that the book wasn't really about "real things, because there was no way all those animals could fit into one small mitten". 
 
Sensing an opportunity for something rich, I questioned the children. I asked them to consider whether a mitten could really stretch that large to accommodate all the animals, and if it couldn't, how big did they think it would have to be in order to do so.
 

The children engaged in a lively discussion and agreed that the mitten would have to be very large - much larger than the one portrayed in the book - and it would be very time consuming to knit. We agreed that one would have to know exactly how big it had to be because if it was too small the animals wouldn't fit, and if it was too big it would waste the knitter's yarn and time.
 
I challenged the children to create a mitten the exact size it would need to be in real life to fit all the animals in the text: a mole, rabbit, hedgehog, owl, badger, fox, bear and mouse.  They readily accepted my challenge. The first thing we agreed upon was that we needed to know exactly how big each animal really was. The children weren't sure how to do this so I suggested researching their sizes on the internet. I helped them with this search.
 
Once we knew the size of the animals I helped the children measure out large butcher paper so that their drawings would be as realistic a size as possible. We discovered that the bear was the largest!
 
 
 







Here are the animals (excluding the bear) after the children researched, drew, and cut them out.


The next thing we needed to do was calculate how big the mitten needed to be. We referred to the book to see if the animals were side by side or on top of each other and then taped together large pieces of butcher paper to create the mitten.


The papers needed to be securely fastened...




...the outline of the mitten cut...
 

...and the seams stapled closed.


The children noticed that when complete the mitten was almost as big as our carpet!


The children enjoyed decorating it too!
 



We felt that it would be fun to retell the story while we placed each animal inside the mitten. We were eager to see if we were right and the animals all fit inside.




The children waited until it was their animal's turn and then gently placed their animal inside.










Once the retell was complete the children had one more question they asked to explore. Would a mitten that was large enough for all those animals hold 14 kindergarten children? They were quite eager to find out! One by one they hid inside the mitten, squeezing to the end and making room for their friends to join in!
 
This was also an incredibly rich math activity. The children had to consider the area of the mitten and if there would be enough room for all the children. They counted as each child entered the mitten and calculated how many more children were waiting on the carpet. They discussed how to preserve the integrity of their design as they entered the mitten so that it held together so all children could have a turn.
 






They were right! All 14 children did fit into the mitten!



 
But the best part of all? Getting out of the mitten!
 



Tuesday, May 24, 2016

How Many Petals? How Explicit Math Instruction Transitions to Child-Centred Learning

In my experience as an Additional Qualifications instructor, one of the most commonly asked questions is how to find a balance in FDK between teacher guided and child-led activities. In an emergent program is it okay for the teacher to take the lead and initiate activities? Do whole group times always have to revolve around the children's interests or is it okay to veer in a new direction? How do adult created invitations for learning transition into child-centred explorations? What does this look like in a real classroom?

Today I set up a beautiful math invitation for children drawn from the text Reggio-Inspired Mathematics (Novakowski, 2015). From our recent experiences discussing nature in our yard in our Beautiful Tree Project I know that our children gravitate to interesting living things. This weekend I did some gardening at my home and picked some of the most interesting flowers I had. I wanted to engage the children as soon as they walked into the classroom in the morning. Not only were the colours vivid, the smell from the combination of flowers could be noticed throughout the room. Each flower had a velvety soft feel and the variety of shapes and textures was interesting to look at. This collection appealed to the children's many senses and was irresistible upon entry into our room. 


Along with the vase I placed many varied, colourful close up photos of other kinds of flowers not displayed in the vase, writing materials (small child-sized clipboards are always more fun to use and easier for the children to handle on an already cozy table), and small wooden blocks. During our first play block the children had open investigation of the invitation. Some smelled the flowers and moved on, others sketched the arrangement, some played with only the wooden blocks.


         

During our opening circle I brought the materials to the carpet and invited the children to discuss them. I asked them to reflect upon and share what they had experienced at the centre during playtime; I wanted them to describe what they saw, what they noticed about the flowers, what they wondered about the materials. I read the sign included in the centre "How many petals altogether?" and encouraged them to consider my question about the flowers.

Many children were interested in the idea that we could count the number of petals and offered suggestions for how to do this.  One child wanted to place one block on each petal of all the flowers and count them to get a total.




Another child thought that each flower petal should first be counted in the vase and then the same number of blocks could be represented in a collection next to it.


After discussing the suggestions and ending our circle time, the children flowed back into the play activities. We noticed that many new children visited the flower activity and were quite eager to see if they could calculate the petals.

Some children represented the totals with blocks and then transcribed the total as a number on the paper...


...others placed the blocks on the pictures and then drew the flower with the corresponding number of blocks...



...and some created addition sentences after putting blocks on many pictures and wanting to discover a total number of petals in all the pictures.


One child spent a long time at the centre. I observed her play; she experimented with stacking and organizing the blocks in many different ways, finally arriving at the following arrangement. When I asked her to explain her work, this is what she said:

"I put one block in the middle where the pollen is. I put one block on each petal, so that's 5. Then I put blocks on the outside of the flower. I wanted to see its outline."


Fascinated by her work, I continued the conversation by reminding her of our work with the tree circumferences in our current outdoor exploration. I introduced the term 'perimeter' and helped model and explain for her that we could find the perimeter of any object including the two dimensional pictures of the flowers at the centre. This is the sort of beautiful evolution of teacher-initiated activities that emerge when children are able to manipulate materials freely and creatively in their own time and space. Educators who engage in playful experiences together with children can first observe, question, introduce and then scaffold more complex math concepts with those children who appear engaged and interested. Discovering the perimeter of the flowers certainly was not what I had anticipated doing with the initial flower invitation, but this is where I was led by this child.


She was quite eager to record her ideas and our conversation and independently shared her math thinking in a written format. Her idea to help explain to others the meaning of perimeter included drawing a picture of the flower and then writing numbers on it to represent the number of blocks used for the outline.



It's my hope that by sharing this example it's evident that not only is it developmentally appropriate to share teacher invitations for explorations, they can be introduced during whole group time and then rediscovered by children in new and innovative ways. Had I first introduced this math invitation at circle the children might have not been as interested, or only counted the flower petals as modeled at the circle. However providing open-ended time for them to discover and explore the invitation before discussing it helped bring richer background knowledge and ideas to our collective exploration. Revisiting the materials after a free and then focused time working with the pictures and manipulatives might have encouraged more children to visit the centre or think more deeply or differently about the topic. As the educator in the space I am satisfied that the idea of counting the petals using manipulatives was explicitly introduced to the whole group and that I was able to meet individual children at their interest and ability levels, especially those that wanted to represent and add multiple flowers together, or measure the perimeter.

My next step for this activity will be to invite the children who visited the centre today to share their ideas (and photos of the experience) tomorrow during our consolidation and sharing circle as we ran out of time today. Perhaps this will help us introduce the idea of measuring perimeter to the whole group and encourage other children to think about measurement and the invitation in a different, more evolved way.

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