Lesson video

Hi everyone, it's Miss Mitchell here.

Today in maths we're going to be representing data in a tally chart and a pictogram.

So go and get yourself ready, and find a nice, quiet space if you can.

In today's lesson, we'll be looking at tally charts and scaled pictograms. You will then complete an independent task, and then a quiz.

For today's lesson you will need a pencil and some paper.

Pause this video now to get this if you have not got it already.

Our star word today is tally.

Can you say the word Tally.

Tally.

One more time really loud tally.

Well done.

Have you used the tally before? And how, when have you used it? A tally is a great way of keeping a record of objects counted without having to change the number written each time.

You just have to add one more line every time the number gets bigger.

So, here is the number one.

Here is the number two.

so the number two is represented by two lines.

Here is the number three and the number three is represented by three lines.

And so on.

But what do you notice about the number five? The fifth line goes diagonally, but there are still five lines.

One two three four five.

I like to call this the lazy five.

So let's count together.

One two three four lazy five.

Six seven eight nine lazy ten.

So, each line represents one.

Here are some coloured dots.

We are going to record the number of dots using a tally chart.

The first colour we're looking at is red.

How many red counters are there let's count.

One two three four five Six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen.

There are sixteen red counters.

Now we are going to do a tally for the number sixteen.

So how many lines will I need to do? One two three four lazy five.

Six seven eight nine lazy ten.

eleven twelve thirteen fourteen lazy fifteen, and then sixteen.

Now that took quite a long time.

Because we were counting up in ones.

What's really great about tally chart, is that you can count up because they are in fives.

So instead of counting ones, I can just say five ten fifteen and then sixteen.

So there is a tally here for the number 16.

And if I keep going across, there is a another column that says the word total.

So here its asking me for the total number of tallies.

And I know that the total number of tallies is the number sixteen.

Because there are sixteen lines over here.

There are sixteen red counters over here.

OK.

let's have a go at counting the number of blue counters.

So we're going to look at this picture over here.

How many blue counters, can you see? One two three four.

There are four blue counters.

So, how many tallies do I need to do, If there are four blue counters? That's right.

One two three four.

So I know the number of tallies and I need to go across to the final column where it says the word total.

Now by looking at my tallies what is the total number of blue counters? Remember each line represents one.

That's right.

There are four blue counters.

Now what I'd like you to do is to pause the video and can you please help me fill in the green and red sorry green and yellow for me we've already done red.

So that's the green and yellow.

Could you pause that now and do that for me? Thank you.

And here are the answers.

So this tally chart shows there are eight green counters, and there are six yellow counters.

Now what we are going to do, We are going to transfer this information on to a pictogram.

But each circle, and remember, the picture can actually be anything but I've chosen to use the circle because it's really quick and easy to draw.

But each circle or picture represents two.

Now let's keep going.

There are sixteen red counters.

And each circle represents two.

So how many circles will I need to represent the number sixteen? Lets count together.

Two four six eight ten twelve fourteen sixteen.

How many counters did I need? One two three four five six seven eight.

Eight counters represents the number 16.

And I know that's correct because eight times two is equal to sixteen.

Let's do the next one together.

The next column here is blue.

So I'm going to go to my table and I'm going to go down to where it says blue.

And then we're going to go across to where it says total.

what is the total number of blue counters? That would be four.

Now if each circle represents two, and I need to get to four, how many counters will I need? I will need two counters.

one two.

And I can check this by counting up in twos, to four.

And I also know that's correct because two times two is equal to four.

What I would like you to do now is to draw the circles for the pictogram for green and yellow.

So you're filling in these two columns here.

Could you pause the video now to do this.

And here are the answers.

So, the next column is green.

So go across to where it says green, and to the number eight.

To get to number eight I need two four six eight.

I need four counters.

And my final column here is yellow.

So I go down to where it says yellow.

I go to across to the total to where it says six.

How can I represent the number six? Two four six.

That's right by using three circles, because each circle represents two.

We can now use our pictogram to answer questions.

There are mmm more or fewer yellow counters, than blue counters.

So let's have a look.

Are there more or less yellow counters than blue counters.

And just by looking at this pictogram I can see that there are more yellow counters.

There are three yellow counters and two blue counters.

So there are more yellow counters.

Now i need to see how many more.

I need to find the difference.

The difference between yellow and blue is one counter.

But you have to remember that one counter represents two.

Don't let it trick you.

So the difference is two.

Because six take away four is equal to two.

So there are two more yellow counters than blue counters.

And again we can just check.

Are there two more yellow counters than blue counters, yes because there's one more circle which represents two.

Let's do another one.

There are mmm more or fewer blue counters, than green counters.

I'm just going to pause for a minute to let you look at the pictogram to see if you could answer this before me.

Are there more or fewer blue counters than green counters.

So we are comparing blue to green.

Now I can see by looking at my pictogram that there are fewer blue counters.

Because there are less.

This has four, this has two.

so there are less, or fewer blue counters.

Now i need to see how many? Green has eight counters.

Two four six eight.

Blue has four counters.

Two four.

So my equation will be eight take away four, which is equal to four.

There are four fewer blue counters than green counters.

Well done.

could you now answer these questions, by looking at the pictogram.

Pause the video now and then press play when you are ready for the answers.

And here are the answers.

If you'd like to share your work Oak National, then please ask your parent or carer to share your work on Twitter tagging @OakNational and #learnwithOak.

Well done today you've done a really really good job.

Now let's see what you can remember by completing the quiz.

See you later.

Bye.