# Lesson video

In progress...

Hello, welcome to today's maths lesson with me, Miss Jones.

I am super excited for today's lesson because we're going to be doing some estimating, some measuring, and we're going to be using some standard units of measure.

I've also got an item here that might appear in today's lesson, it's quite heavy.

Can you guess what we'll be doing in today's lesson? Let's find out.

In today's lesson, we'll be experiencing standard units of mass.

We'll be measuring objects, making some predictions.

You'll be doing an independent task and finally, you'll be doing an end of lesson quiz.

For this lesson you'll definitely need a pencil and a piece of paper to write down demands for your task today.

Throughout the lesson, you may need some household objects.

You'll need to ask your parents or carer, if you can have some objects heavier than a kilogramme and some objects lighter than a kilogramme.

I'm going to tell you when you're going to need those objects.

So you can pause the video throughout to get what you need.

Okay, let's have a look at this picture.

I'd like you to have a go at describing what's happening in the picture.

When you're describing, I'd like you to use a full sentence and use some star words.

Can you use the words lighter, heavier, or mass? Pause the video now to see if you can describe this using some full sentences.

Hopefully you've paused the video and had a go at describing this image.

I might describe it as the book is heavier than the water bottle.

The water bottle is lighter than the book.

The book has a greater mass.

The water bottle has a smaller mass.

Were those similar to your sentences? Let's have a look at something else.

Here, I've got something called a weight.

We use weights to help us measure the mass of objects.

There's some writing on the weight.

Have you seen one of these before? Now this weight is one kilogramme.

Kg stands for kilogramme.

Can you say kilogramme? My turn your turn, kilogramme.

Now if we were in school, we'd be looking at some one kilogramme weights, but as you are at home, we're going to think about what else weighs a kilogramme apart from this one kilogramme weight.

And we're going use that.

I'm going to look for something in my house that weighs one kilogramme.

I have found a bag of sugar.

Here is my bag of sugar.

It weighs one kilogramme.

If you've got something like this in your house, ask your parents or carer, if you can go and get it, it might be a bag of sugar or a bag of flour.

You can tell it weighs one kilogramme by looking for this information on the packet, one kg.

If you haven't got anything, don't worry because we can still estimate.

But if you have go and have a look for it and get it now and see if you can feel how heavy it feels.

Pause the video now to do that.

Okay, now that we know how heavy one kilogramme is, we can use that information to help us make some predictions.

I wonder what will be lighter than a kilogramme and what would be heavier than a kilogramme.

Here we've got some questions for you to think about.

What is lighter than a kilogramme? What is heavier than a kilogramme? What is equal to a kilogramme? I'd like you to look in your house and see if you can find some items for each question.

Can you find an item that is lighter than a kilogramme lighter than my bag of sugar? This will be a bit more tricky.

Can you find something that is heavier than a kilogramme.

Now because it's quite heavy and heavier than this bag of sugar.

And then a challenge.

Can you find something else that is equal to one kilogramme or maybe approximately equal to one kilogramme by estimating? I'd like you to pause the video now and go and find your objects.

Okay, hopefully you've got your objects.

Should we have a look at some of the objects that I found.

Lighter than a kilogramme? What did you find? I found a book.

The book was lighter than my bag of sugar was it lighter than one kilogramme? Help me, I felt them both in each hand and I felt that my book did not feel as heavy.

Heavier than a kilogramme.

This one was a little bit more tricky, but I did manage to find something remember that this item, you might need to hold it with two hands or ask your parents or carer to help you.

Do we see what I found? I found a bag of apples.

When I tried to hold my bag of apples, I needed two hands and it felt heavier than my bag of sugar.

Finally, what was equal to one kilogramme? Now I had to estimate this one, but I felt my bag of sugar in one hand.

And in the other hand, I held a bottle of milk and they felt about the same mass, the same weight.

So I think my bottle of milk was approximately equal to one kilogramme.

Did you find anything that was approximately equal to one kilogramme? Well, for your independent task today, I'd like you to go off and look for some more objects and then write your findings down in a table.

Can you pick four objects and for each object tell me, is it less than a kilogramme, equal to one kilogramme or more than one kilogramme? Use a tick to help show which one it is.

Once you're done, you can come back to the video.