Lesson video

Hi, everyone.

My name is Mrs. Jenkins.

I can't wait to learn with you in today's lesson.

Welcome to today's lesson from the unit: Using IT to Organise and Present Data, where today's lesson is called Counting and Comparing Data.

By the end of today's lesson, you will be able to record and compare data on a tally chart.

In today's lesson, we have two keywords.

We will be visiting these keywords throughout the lesson, so keep your eyes open for them.

Today's keywords are: data and tally.

Data is numbers, words or pictures collected to learn something.

And tally is counting by adding marks for each item.

So just a reminder, we have data and we have tally.

Our lesson today is split into two parts.

Our first part of the lesson, we are going to be focusing on recording data in a tally chart, I would like you to have a little look at the screen and have a think how many elephants can you see? And we're gonna call on Andeep to help us here.

And Andeep says, "There are four elephants." Are they right? Let's check.

One, two, three, four.

That's right.

We have four elephants.

Now we're gonna look at how many tigers can you see? So have a little think.

We're gonna call on Sam this time.

Are they right? Let's see.

Sam says, "There are eight tigers." Let's count them all together to make sure.

One, two, three, four, five, six, seven, eight.

That's right.

There are eight tigers.

It is easy to count small numbers of objects quickly.

We can have a quick look and just know how many there are.

When there is a much larger number of objects or more than one type of object, we need an easier way to record the data and that's our keyword has come back in there.

So to remind us, data can be letters, numbers, or pictures that have been collected.

The data you have collected so far is how many tigers and how many elephants you can see.

When we get into more animals, we can record your data with tally marks.

So we spotted our keyword "data" there and we've also got the keyword "tally marks." Each time you count an object, you put a mark in the table.

You can cross off the animals as you put the mark in the table to make sure we don't count any of those animals twice.

So we have one elephant, one tiger, two elephants, two tigers, three tigers, three elephants, four tigers, and four elephants.

Once we have finished marking off the animals into our tally chart, we can record the total number.

And the total number of elephants is four, and the total number of tigers is four.

And a reminder that tally is those marks that we have used to count the animals.

Have a little check now.

How many animals are shown? So we've got A, B, or C, and they all show different amounts of tally marks.

Which set of tally marks are showing the correct amount of animals? Welcome back.

Let's have a little look.

How many animals are shown? We have got: one, two, three, four.

So if you got A right, you were correct, well done! Because in A, we have one, two, three, four tally marks.

Tally marks are a really quick way to record data.

They can be recorded easily using a pen and paper.

So we've got an example below of the tally mark we have just done with our elephants and tigers.

If there are five of an object, you change the way you add the fifth tally mark.

Instead of doing another vertical line, we do a diagonal line that crosses off the other four tally marks.

This will give you neat groups of five in the tally chart.

It makes counting even easier.

We can count larger numbers up in fives and add on the ones at the end, so 5, 10, 15, 20, and then just adding any additional numbers at the end.

True or false? These tally marks show the correct way to count seven objects.

Welcome back.

These tally marks show the correct way to count seven objects.

True or false? It is false.

And the reason why is we record counts of five with a diagonal line to make it easier to find the total.

So here for seven, we have one group of five, and then two more, because five add two equals seven.

Your first task is to create a tally chart to show how many animals are on the farm.

So we're gonna be counting how many cows by tally mark, how many pigs, how many chicken, and how many sheep.

Good luck.

Welcome back.

Our first task was to create a tally chart to find out how many animals are on the farm.

How did you get on? Let's have a look at the answers.

So we have got four tally marks to show four cows on the farm.

For our pigs, we have got two groups of five and two more marks.

So 5, 10, 11, 12 pigs.

For our chickens, we have one group of five, add one more.

So five add one is six.

And for our sheep, we have five.

And we can see that because it is grouped with one set of four tally marks and one diagonal line through them.

Well done, everyone.

We are moving on to our second part of the lesson now.

We are going to compare data on a tally chart.

When you collect data, you can use it to find answers to really important questions.

For example, we might ask how many pupils in the class have hot school meals? Which film would the class prefer to watch? Or how many people are going on the school trip? All of those questions can be recorded, the answers can be recorded as a tally chart.

We looked earlier, how many pigs are on the farm? How did you get on? Did you get 12? Because there are 12 pigs on the farm, and we can check that, we have two groups of five plus two more, so 5, 10, and then 11, 12.

Well done.

Using the data collected on a tally chart, you can quickly find which object has been recorded the most or the least.

True or false? You can use tally charts to see what is the most or least popular object.

Welcome back.

So we had a true or false.

You can use tally charts to see what is the most or least popular object.

The answer is true.

We can use our tally charts to compare data and see what is the most or the least popular object.

What animal does the farmer have the fewest of? That's right.

The farmer has the fewest cows.

And that is because there are only four cows on the farm, and that is the smallest number in our tally chart.

Let's have a little look.

We've got some animals here.

Which animal does the zoo have the most of? Welcome back.

Which animal does the zoo have the most of? Thank you, Andeep.

The zoo has eight tigers.

That is more than the other animals.

Okay, because eight is higher than seven, five and four.

Okay, we are going to move on to our second task now.

We are going to have two sets of questions.

So the first set of questions, the class voted for their favourite animal.

And our questions are: Which animal had the most votes? Which animal had the fewest votes? Which animal had more votes than the tiger? Welcome back.

Let's have a little look at your answers.

The class voted for their favourite animal.

Which animal had the most votes? Which animal had the fewest votes, and which animal had more votes than the tiger? Let's have a look at our answers.

The elephant had the most votes.

The zebra had the fewest votes, and the animal that had more votes than the tiger was the elephant.

Here is our second set of questions for Task Two.

The class voted for their favourite animal.

Which animal had fewer votes than the leopard? Which animal got eight votes? Which animal had two more votes than the zebra? Have a little look.

Okay, how did you get on? The class voted for their favourite animal.

I'll just recap those questions.

Which animal had fewer votes than the leopard? Which animal got eight votes? Which animal got two more votes than the zebra? Okay, let's look at our answers.

The zebra got fewer votes than the leopard.

The tiger had eight votes, and the animal that had two more votes than the zebra was the leopard.

How did you get on? Well done, everyone.

Well done, everyone.

You have worked so hard in today's lesson.

Let's summarise what we have learned today.

We have learned that data can be letters, numbers, or pictures that have been collected.

You can record your data with tally marks.

When you count five items, you record it with a diagonal tally mark.

This makes it much easier to count up our numbers.

Using a tally chart, you can quickly see the most or the least popular item.

Great work, everyone.

I hope to see you again soon.