Category: Math Talk at Home

June 8th, 2017 by megan

“It’s the green crayon!”

My daughter squeals at dinner.  We are playing a game that I call What Am I Hiding? It’s a great game to play when you are at a restaurant, especially if it is a place that has crayons, salt and pepper shakers, sugar packets, and other various items on the table.

She gets to look at the collection of items for a moment before closing her eyes. When I’m sure she’s not peeking, I hide one (or more) of the objects.  Her job is to guess what is missing.  It’s great fun!  She especially loved this game when she was between the ages of 2-3. We adapted it over time to include more items, but it rarely needed any modifications. She also enjoyed hiding items from me!

Now that she’s older, we enjoy playing this game.  We don’t usually play with bears and we rarely have such a fancy cave, but the game is just as much fun with pennies hidden under a hand and it’s great for practicing number combinations.  To get started, I let her look and count how many pennies make up the whole collection.  Then, like the previous game, she closes her eyes and I hide some. Her job is to figure out how many pennies are hiding. When we started playing this game we would play with five pennies.

The development of mathematical reasoning is so interesting!  Initially, she would tell me that she couldn’t know how many were under my hands.

“There could be any amount under there!” she would protest.

Her guesses started wild, so I would try to hide the same amount over and over again.  I hid 1 and she would find 4 hiding under my hand. Next, I hid 4 so she would find 1 hiding.  Then, I would return to hiding 1. Eventually, she learned to use her fingers to figure out the differences and now she just knows these combinations. Her favorite pairs are 0+5=5 and 5+0=5.  Zeros are just so silly!

We’ve tried playing this game with 6, 7, 8, 9, and 10 pennies too. Usually, I just let her pick a starting amount.  I have visions of us playing this game with different money amounts and a collection of nickels and dimes, but we aren’t quite there yet.  The original activity is still fun so we’ll just continue with it for the time being!

Posted in Math Talk at Home

May 13th, 2017 by megan

“I want 5 chicken nuggets, put them like 3 and 2.”

My 6-year-old declares just before dinner.  We’ve been including math into our talk since she could talk.  Tonight she anticipated my next question, how would you like the 5 nuggets arranged on your plate?  Talking math is something that we do everyday because it’s fun, interesting, descriptive and relevant.  Plus, I think it’s the best way that I can support her mathematical understanding at home.  How many? was a regular part of our early discourse.

She: “Mommy, I want grapes.”
Me: “Okay, how many grapes?”
She: “Two!  Because I’m two!”
Me: “Here you go!”
She: “Mommy, that is not enough!”
Me: “Oh. You want more? You said two. How many do you want?”
She: “Twenty, or a hundred?  I don’t know.”
Me: “Okay, you help me count and tell me when there is enough for your belly.”
She: “1, 2, 3, 4, 5, 6, 7, 8.  That’s enough.  I guess I want 8.”

How many, like many of our mathematical conversations, has evolved. How many more? and How would you like them arranged? are more interesting questions now. Sometimes my questions lead nowhere, but occasionally we find ourselves in the middle of a truly rich discussion.  One day, I pulled out a small bag of jelly beans for us to count.  I asked her, How many jelly beans do you think there are here?  She has never been a big fan of estimating.

She: “Why would we guess when we can just count to figure it out?” 

Okay, okay… I arranged them into a circle, because I wanted to see her strategy for keeping track.  At first, she counted around and around.  Eventually she reached 39 and wasn’t sure what came next. Then she paused.

She: “I don’t really think there are that many jelly beans here.”
Me: “Yea, it doesn’t really look like 39, does it.  Do you think there are more or less?”
She: “Less.”
Me: “How can we know for sure?”
She: “I’m trying to count them!”
Me: “It’s tricky when they are like this.  What should we do?”
She: “Okay. I got an idea.  I’ll start with the white one and pull it out a little so I know where I started.”
Me: “Let’s see if that works.”
She: “Okay, there are 19.”

I continued our discussion by trying to convince her that I could make more jelly beans, but she didn’t believe me.  I spread them out in a big long line and declared that there were now more jelly beans.

She: “Mommy, there isn’t more jelly beans!  You just moved them!”
Me: “Are you sure?”
She: “Yes!”
Me: “Okay, but I think there might be more now.”
She: “Well, maybe we should count them.”

She was quite pleased when the count came out the same, and I was quite pleased when she asked me to rearrange them again.  I guess she wasn’t so sure the count would stay the same after all. We tried a surprising number of arrays and arrangements during this discussion!  She was counting and giggling and counting and giggling.

She: “It’s always the same!  It’s just 19 every time!”
Me: “Wow!  That is surprising.  I really thought we were making more jelly beans.”
She: “Mommy, you can’t make more jelly beans.  You can just move them, silly.”
Me: “Oh. Now I know.”

I tried to keep the discussion going by asking her how we could split these jelly beans so that we both got an equal amount, but she told me we should just share them nicely.

So not all of my questions lead to an interesting exploration, but I keep asking.

More questions:

Here is a list of questions that have led us into interesting discussions at home. Sometimes I’ve had to ask them more than once because they didn’t take on the first try, but I’m quite perseverant when it comes to math talk!

  1. Can you find a table (at this restaurant) to fit our family?
  2. How many forks will we need for dinner tonight?  How many glasses will we need?
  3. How many fingers do we have all together?  How many toes do we have?
  4. Can we share these equally?  Could me, you, and Daddy share these equally?
  5. How tall are you?
  6. How many steps will it take us to get back to the car?
  7. What’s the highest number you can count to?
  8. Who has more?
  9. What shapes do you see in this room?
  10. How many yogurt cups should we buy for your lunch this week?

And because we have a culture of questioning in our house, she has begun to ask her own questions.

  1. What is the last number?
  2. How far away is the sun?
  3. Does the Earth have walls that you bump into or can you just keep walking forever?  How can you even do that, anyway (walk forever)?
  4. Time doesn’t stop, does it?  It just keeps going in a circle.
  5. Will I ever catch up to you and get to be the same age as you?
  6. What number will we get to if we fill this page with numbers?
  7. What is the number between 1 and 10, in the exact middle?
  8. Are you still growing?  Will you be a giant when you get old?
  9. When are we in the middle of our drive to school?  If we are in the middle, does that mean we are not closer to home or to school?
  10. Do you think we have 100 things in our house?

I can’t always answer her good questions and I mostly don’t try.  It’s more fun and interesting when I pretend that I don’t know anything!  She sticks with her ideas longer and we both enjoy a longer walk through NumberLand.

Look who else is talking:

As a math teacher, my first recommendation to parents who wonder what they can do at home is, try to include more math into your everyday conversation.  However, not everyone is certain how to engage in math discussions with their kids. Here are three resources for inspiration:

Posted in Math Talk at Home