Lesson video

Hi everybody.

Today, we are going to be constructing some bar charts.

So let's get started with our lesson.

Put on your hats.

Tighten those ties.

And tell the computer, now I'm a mathematician.

Super, let's get started with our learning.

For this lesson.

You are going to need the following resources.

A pencil, a piece of paper and a ruler.

If you need to go get any of these things, please pause the video now and go collect them.

Great, let's get started.

So here is our lesson agenda today.

First off we're going to have art star words.

Then we're going to be looking at what's the same, what's different.

And then we're going to be reading data before the end of the lesson task.

So here are star words! So we going to be looking at bar charts, tally charts, frequency tables.

We're going to be comparing.

We're going to be reading scales.

We're going to be looking at data.

We're going to be reading our axis with a horizontal and a vertical.

Can you show me vertical? Can you show me horizontal? See that, let's not get these mixed up, great.

So, here we have two bar charts.

What's the same and what's different? Well, if you look at the scales, the scales are different.

You can see on the left, they're going up in tens, but on the right, they're going up in 25's.

So we can see, that, let's have a look at the cause.

So, each scale.

So each little block is worth two.

I can see that 42 people like driving in their car but we can see for the car, it's a lot more than that on the other side, it's over 100.

So the amount of data collected is different as well.

So here we have our data.

So let's have a look at this data that's been recorded in the frequency tables.

Which scale will be the most appropriate for each set of data? Which scale would not be appropriate for either set? Would giving up in tens be a good idea for the first one? Maybe, because the total is 78 and we don't want our bar chart to be total.

What about for our second set of data? Will being tens be a good idea? I reckon we could probably the scales are going up in fives because otherwise our bar chart will be tiny.

For our first set of data, would going up in two's be a good idea? No, it would be the tallest bar chart you've ever seen.

However, for our second one, we could use two's if we wanted to.

So here we have our tally charts and we have collected some data of what New Yorkers favourite New York snack is.

We have pizzas, hot dogs, pretzels, doughnuts and cheesecakes.

And we can see that, for example, in pizza, there are five, 10, 15, 20, 25, 30, 31, 32, 33, 34 people like pizza.

For hot dogs, five, 10, 15, 20, 25, 30, 35, 40, 44 people like hot dogs.

For pretzels, five, 10, 15, 20, 22 people like pretzels.

For our doughnuts, five, 10, 15, 20, 25, 30, 31 people like doughnuts.

And for our cheesecake, five, 10, 15, 16, 17, 18, 19 people like cheesecakes.

So now we have counted up our tallies.

We can fill in our frequency table.

So for pizza, there's 34 people.

Hot dogs there's 44.

Pretzels is 22.

Doughnuts is 31.

Cheesecakes was 19 and our total people asked are 150.

So what would be an appropriate scale? Would two's work? No, would fives? No.

what about tens? I think tens would be a great one to use because obviously it goes up to 44 and we don't want to have a total, a bar chart so we could use a scale going up in tens.

How should the vertical axis be labelled? So this is what our numbers are going up in.

They could be in twos, fives, tens, twenties, fifties, hundreds.

Whichever the data decides that it needs.

For this one, we could label it in tens and then we will call it, number of people asked.

Along the bottom would be your food options.

So the horizontal are your options.

So you'd have pizza, pretzels, doughnuts, cheesecakes along the bottom.

For your independent task, you're going to label and complete the bar chart including a scale on the vertical axis, the food names on the horizontal axis.

The vertical axis labelled number of people, the horizontal axis labelled favourite New York snark and you are going to draw the bars with a ruler.

So use the frequency table we created before to label and complete your bar chart.

Pause the video.

Well done everyone.

I hope you enjoyed drawing bar charts today.

If you'd like to, please ask your parents or carer to share your work on Twitter tagging @Oak National and #Leavenworth.

I really enjoyed today's lesson.

And I look forward to learning again with you soon, bye.