I didn’t enjoy Math until I was in high school. Trigonometry was the first time that I remember gazing up in amazement and wonder. Sin and Cosine. Identities, theorems, and proofs. Parabolas and Ellipses.  It suddenly became interesting even if it was hard. I loved using the nifty functions on the calculator as well. But why did it take me so long to appreciate the beauty of math? I wonder where and who I might be if I had learned less about standard algorithms and more about number concepts and reasoning at an earlier age.

I don’t see how it’s doing society any good to have its members walking around with vague memories of algebraic formulas and geometric diagrams, and clear memories of hating them. It might do some good, though, to show them something beautiful and give them an opportunity to enjoy being creative, flexible, open-minded thinkers— the kind of thing a real mathematical education might provide. ……. to create a profound simple beauty out of nothing, and change myself in the process. Isn’t that what art is all about?

From A Mathematician’s Lament by Paul Lockart-

For me, if I can invoke wonder and surprise, then the beauty of communicating in numbers becomes self-evident and a student’s heart awakens to the joy of an interesting problem or question. Creating this experience is a passion of mine. After spending a week with Lana Fleiszig, it’s hard NOT to be more inspired to create a love of math in our classroom. Her enthusiasm is contagious, and her advice about inquiry is clear–know your destination, but don’t worry about how you get there. Don’t be afraid to throw students into the “pit of learning” and allow them the experience of confusion. As I have come to appreciate her point of view, I recognize that when students climb out of their “pit”, that’s where beauty lies.

So here we are, in another stand-alone unit, which might be considered the “place value” unit, which is not typically the most exciting math concept. It’s a ho-hum inquiry into base-10 blocks in how we express large numbers and use it to develop strategies for addition and subtraction. But what if we threw them into the learning pit and took our time to really develop number sense. How might we approach our planning and execution of the unit if this wasn’t a race to tick off a curriculum math standard?

The Standalone

Let me break down the basics of the unit for you:

Central Idea: Numbers tell us How Many and How Much

• The amount of a number determines its position in a numeral.
• How we know when to regroup.
• How grouping numbers into parts can help us find solutions

(All lines of inquiry and Central Idea from conceptual understanding in the PYP Math scope and sequence and subsequent learning outcomes in  Phase 2)

Knowledge and Understandings, aka, “The Standards”

I’m going to cross-reference 2 commonly used national curriculum, Australian and American Common Core, because our team needed clarity into exactly WHERE our destination needs to be in this unit of inquiry:

Australian:

Understand place value.

Use place value understanding and properties of operations to add and subtract.

Planning the Unit

If you “peel” back these standards, what (math) concepts and skills seem evident to you? What are the “big ideas” that students need to walk away with?

• Collection or Group
• Place Value
• Position
• Partitioning: composition and decomposition
• Reasoning

Since I teach 1st grade, we would be exploring the key concept of Form and Function, mainly, throughout this unit. But we would also look at the Connection between using groups of 10s and developing mental strategies for problem-solving in which we can Change addends/subtrahends around to make friendly numbers. Students would also need to consider the Perspective of other mathematicians in our class when it came to solving a problem in different ways.

With this in mind, we looked at these standards and identified 5 main guiding questions  that will be the basis of our inquiry and the purpose of every provocation that we create:

1. How does the place value system work?
2. How does the position of a digit in a number affect its value?
3. In what way can numbers be composed and decomposed?
4. In what ways can items be grouped to make exchanges?
5. How can we use place value patterns for computation?

Provocations to Explore and Reveal Math Thinking

Once we had clarity around the big ideas in our unit and created our guiding questions, it became easy to start planning provocations.  Using a guide like this one, Task Identification Tool_Identifying High-Quality Tasks (1),  from the work of John J. SanGiovanni in his book series on how to Mine the Gap for Mathematical Understanding really helps teams like ours to create a high ceiling, low-threshold activity for inquiry-based maths.

We knew from a previous provocation, (14 or 41–the position of a numeral doesn’t matter. Agree or Disagree. Prove it.), that students still were developing an understanding of what a written number means. We needed to further explore it. So we began with place value.

Guiding Question #1: How does the place value system work?

We decided to launch the unit with an emphasis on language since we noticed that a lot of students were mixing up their teen numbers when explaining their ideas. So we started with Teen vs. Ty, is there a pattern or a rule about these numbers?

1. Sixteen and Sixty, What do you notice about these numbers?
2. Seventeen and Seventy? How are they different, how are they the same?
3. What do you think “teen” means? What do you think “ty” means?

We then began exploring expanded notation with showing the tens in a number. Students were introduced to how expanded notation is related to the place value mat, which can be represented as:

43=40 + 3 or 4 tens and 3 ones. 

The students played a partner game called “guess my number” in which they had to express a number in tens and ones and have the student create it with base-10 blocks and numerals.  They did really well. We thought we were smashing it and ready to move on to using it for addition and subtraction.

But how could we be sure they “got it”? ……….

Assessment

We decided to assess if they got the idea of base-ten and how we use the place value mat as a structure to show the parts of numbers. We used this SeeSaw prompt to assess if they truly understood:

How we know when to regroup – Using a collection of objects – how do you find out how many items you have?

We decided to use unifix cubes because the “tens” weren’t prepackaged, sort of speaking, as they are with base-10 blocks. In this assessment, we had them grab a handful of unifix cubes and organize them on the place value mat, explaining to us what number they thought they had. What we observed stopped us dead in our tracks and ask what misconceptions do we see? Here is an example of a common surprising result:

As you can see, this student didn’t connect the quantity he had in their collection at all. These students would need some additional support with connecting the amount of a number to how it is written and presented.  We felt we needed to go deeper into how we “bundle” tens to count things efficiently. In fact, we felt we needed to do an inquiry into 10, so they could appreciate how this is the basis of base-10.

Back to the Starting Line?

We are in Week 4 of this unit, and we are going back to the starting line. Based on our observations, it seems that the students don’t quite have the idea of ten yet, and, we have a group of students who just need to work on skip counting by tens. It would be easy to move ahead and push through so we can tick off our standards, but we’d rather spend more time immersed in context and play that develops their number sense than to push them along. We understand our future impact. Moving ahead hoping that they “get it” later on would seem like a disservice, as they’d lose the interest and motivation to do more complicated mathematics and have half-baked conceptual understandings.

Since have a free flow of student groups, in which children choose what Must Dos and May Dos they want to participate in. However, ideally, we have 3 primary activities that we want the students to work through in small teacher groups throughout our math learning time:

The Big Idea of our teacher-directed groups: 10 can be thought of as a bundle of ten ones — called a “ten.”

• The Base-10 Bank

Students will pick a numeral and build numbers using “ones” which they can exchange for tens. As partners, one person will be the “bank”, which the other partner can trade in their ones for 10. No place value mats, only the base-10 blocks.

• Race to 100

Using dice, a hundred’s chart and a place value mat, students have to roll and add their way to 100. As they roll their way up to 100, they have to build the new number, using the place value mat to show how the quantity that is ever-increasing, as well as giving a context for exchanging units.

Making Bundles: In this activity, students are given a collection of objects and they have to bundle them up into tens, so that they have an appreciation of the value of a number.

Additional Games and activities that they can do independently, when not working with a teacher. The May-Dos:

Traffic light (Partner Game): One partner comes up with a “mystery” number and, using a place value mat, has to try to guess what digit is in what position.

Big 4 (Independent or Small Group): In this game, we use a hundred chart to try to get to the biggest number in just 4 moves. A child rolls a die and moves that many spaces, moving in any direction, forwards, backward, diagonally, upwards or downwards. This game gives them practice at thinking about number patterns as they move around the hundreds chart.

Ready or Not?

After all that exploration, we hope that these games will prepare them for the following formative assessment:

4+4 = 44. Agree or Disagree? Show how you know. (This actually is inspired by a misconception that we observed) Students can use 10-frames, the Hundreds Chart, Math Racks or Base-10 blocks to provide evidence of their reasoning. (We determined that these sorts of materials would help them to “see” patterns and make connections, rather than loose parts alone)

If they can articulate and demonstrate a firm understanding of place value in this provocation, then we feel that we can move into applying our understanding of using the base-10 for addition and subtraction, examining the guiding question:

How can we use place value patterns for computation?

This is the ultimate reason why place value is such a critical understanding after all. However, it is the journey into number sense that makes this a beautiful experience. We are not quick to move them onto pencil and paper. We want them to experience numbers and segue them into contextual situations.

The Summative

We are still in process with determining the actual prompt, but we feel that we need to give them choices with the task. Choosing a task that shows how they apply grouping strategies to solve addition and subtraction problems will ultimately be our goal.

For our low-level readers, we will give them an oral word problem and then hand them a collection of objects that need to be counted. We want them to observe if they create groups of tens to determine the number. No place value mats offered, but they can request one. For our stronger readers, we will give them a word problem, and, again, offer them concrete materials, but other tools to solve the problem are upon request.

At the end of this task, we can identify the skills and understandings they have acquired. Although we have “mapped out” where we think this unit will go, we can be flexible and stop to address misconceptions along the way. Will they arrive and “meet the standard”? That is entirely up to us, and how effectively we observe, challenge and question our students’ thinking as they playfully and joyfully experience numbers. At the end of the day, that goal–to appreciate and be fascinated with numbers--that is the true destination of math inquiry.

Judy Imamudeen

Developing learners as leaders is my joy! I am committed and passionate International Baccaluearate (IB) educator who loves cracking jokes, jumping on trampolines and reading books. When I’m not playing Minecraft with my daughter, I work on empowering others in order to create a future that works for everyone.

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