Lesson video

Hi friends, it's Miss.

Molnar here.

And today, we are going to do some amazing maths learning all about weights and measuring how much objects weigh.

And of course, we're going to use some language like heavier and lighter and maybe even equal to or balanced.

Now today for this lesson I brought along my trusty sidekick Harold the Hedgehog, say hi to everyone Harold's.

Alright, let's see what you're going to need for today's lesson.

Alright, Harold, what do we need for today's lesson? So for the lesson today, you're going to need some different household objects to weigh.

So it might be some cups, it might be some teacups, It might be books, but make sure you ask your parent or carer first, what you can use two weigh.

Now, if you've got some kind of scale in your house that would be useful today.

So whether it's a scale that you stand on to measure how much you weigh or if it's a kitchen scale or balance scale, any of those would be really useful to have for today's lesson.

But if you don't have one, don't worry, we can just use our hands to be looking at what's heavier or lighter.

So, pause the video, go grab what you need for today and we can get started.

Okay, so I've got a balance scale here, okay? So just like you've seen, you might have seen before, if something is heavier on one side, you're going to see the balance scale go down on one side to show that it's heavier, okay? If the object is lighter on one side, then you'll see that side go up.

At the moment, once it stops swinging back and forth, this should stay in about the middle to show, that at the moment they are balanced or at the same level, they have the same amount of weight on each side because there's nothing inside it.

Okay, so I've got some objects from home and we're going to talk about which ones we think are heavier and lighter.

And we're going to set two at a time and weigh them.

And you're going to help me think and estimate or make a guess about which ones are heavier or lighter.

Okay, so what I've got is, I've got a water bottle, I've also got a container of soap, hand soap.

I've got a cup, I've got a stone coaster and I've got an apple, okay? So we're going to estimate two of the objects first, we're going to estimate which one will be heavier or lighter.

So the first two things I'm going to choose are I'm going to choose this container of soap and I'm going to choose the plastic cup.

So take a second to think, which one do you think will be heavier? And which one do you think will be lighter? And why do you think that? Alright, well my estimate is that the soap container is going to be heavier because it's got some liquid inside.

And at the moment it feels a little bit heavier in this hand than the other.

So that's put them in and see.

So I'm going to put the cup in this side.

Alright, so at the moment, before I even put anything in the other side of the scale, what's happened to the scale? That's right.

This side has gone down to show that this is the heavier side, because I've put the cup inside.

So that means at the moment there's more weight on this side, this side is heavier than that side.

Now I'm going to place this in the other side and let's see what happens now.

Okay, can you explain what's happened? That's right.

We could say that the soap is heavier than the plastic cup.

Well done, boys and girls, fantastic.

All I wonder, do you think we can find any of the objects that would be heavier than the soap? So I've still got a stone coaster, I've got an apple or I've got my water bottle.

Now this water bottle isn't full it doesn't.

It's not full of water.

So what do we think? Hmm, shall we try a few? Let's try and see the stone coaster, what happens.

So I'm going to take the plastic cup out and I'm going to put the coaster in and then lets see what happens now.

What has happened? Has the scale moved at all? No, it's not moved.

So that means that the soap is still heavier than the coaster, my goodness! Alright, Let's try the apple and see.

So the apple goes in, huuh! Has it moved? No, it has not.

So again, we know that our soap is still the heaviest object.

Alright, I'm going to take this out.

And now I want to see if I can measure between the apple and the coaster.

This is a little bit of a tricky one because they feel quite similar in weight to myself.

So I'm not really sure what's going to happen.

So let's put the coaster in and see what happens.

Can you explain what's happened? That's right.

The coaster is heavier than the apple.

It is, look at that how much it's gone down compared the apple is definitely lighter.

Well done.

Okay, let's see now.

I think maybe let's compare the large water bottle and the apple.

I want to see if the apple is heavier or lighter than the large water bottle.

So lets have a go at that.

Whooo! What is happening to the scale this time, boys and girls? Is one side necessarily heavier than the other, what do we think? Whoo! Let me put it like that.

There we go, it was pretty balanced at first, wasn't it? I was a little bit concerned, but I think it is in the end.

I think it is, actually the water bottle is heavier than the apple.

Alright, if you've got a scale at home, whether it's a kitchen scale or balanced scale or a scale for measuring your weight, have a go at taking a few objects that you have and just comparing their weight.

See if you can use some of the language out loud.

Alright, so for your to talk tasks, we want you to have a go at describing the different scales, that you can see on the screen.

We've got a blue scale with some marbles on it, we've got a red scale with some marbles and we've got a green scale.

So we've got some sentence stem on the screen that can help you.

So you might say, three marbles is heavier than the side with one marble on the red scale, you might look at the blue scale inside, hmm, it looks like those might be balanced, okay? So we want you to have a go, describing the different scales that you can see on the screen and using language such as balanced, lighter and heavier.

Have a go at that we'll come back together.

Alright, how did it go describing the first few scales? Well done.

Well, I've got a few more pictures here of the blue scale, the red scale and the green scale.

Can we have one more go describing what we see? So maybe I'm going to start with the green scale.

And I might say, the green scale is showing that one side is heavier.

Maybe I'm going to say, the two marbles together is heavier than the one marble 'cause I can see that the balance scale is off centre and one side is heavier than the other.

Alright, Pause the video again, have a go describing the two other scales you see on the screen and then we'll come back together.

Okay, for your main task, you're not going to need to choose three objects.

So I've got a teacup, it have got an M on it from Miss Mona.

I've also got a pepper grinder and I've got a banana, okay? So the first thing I need to do is I want to estimate, or make guess as to which one's going to be the heaviest and which one's going to be the lightest.

So my estimate is that the banana is to be the lightest.

And my estimate is that the teacups is going to be the heaviest.

Now I'm just thinking about the materials that they're made out of.

I've got some glass, that the cup is made of.

So I think that's going to be the heaviest.

Alright, so what we're going to want to do is put them in order from the heaviest to lightest, okay? Now, I only have two sides on my balance scale.

So I can't measure all three at the same time.

So I'm going to pick two, compare them, weigh them, and then I need to keep comparing and weighing the different objects at different times.

So I'm going to show you.

So first thing I'm going to do is I'm going to put the banana in one side and I'm going to put the pepper grinder in the other side.

Alright, can you tell me which object is heavier? Which object is lighter? That's right.

The banana is lighter than the pepper grinder or the pepper grinder is heavier, okay? So at the moment I know, at the moment, that the banana is the lightest object so far.

So I'm going to put that down.

And now what I need to do is I need to put the teacup in the other side.

If the pepper grinder is heavier than the teacup, then I know that the pepper grinder is the heaviest object.

But if the teacup is heavier, then that tells me that the teacup is the heaviest and it would still be heavier than the banana.

I wouldn't need to compare this to the banana 'cause I already know that the banana is lighter than the pepper grinder.

Alright, let's have a go and see what happens.

Alright, what has happened? The pepper grinder is the heaviest.

So my estimate was originally that the teacup was going to be heavier, but when we look at the pepper grinder, it's the bigger object, it's got some metal and some glass.

So it makes sense that it is the heaviest.

Okay, so now that I've weighed my objects, I need to put them in order from the heaviest to the lightest.

Alright, so which one was my heaviest object again? That's right.

It was my pepper grinder.

Alright, so I'm going to put my pepper grinder first as my heaviest object.

Then which object comes next? As the next heaviest, is it the banana or is it the teacup? That's right.

It is the teacup.

So I'm going to put the teacup next.

And then finally, my lightest object is the banana.

Alright, for your main task now.

We want you to have a go at weighing three items from your home, okay? First, what we want you to do, is we want you to have a guess at which item will be the heaviest without picking them up and comparing them, okay? Then you're going to have to weigh the items. So if you've got a scale that will come in use right now, and you can get a parent or carer to help you see which one's the heaviest.

If you don't have a scale, you and your parent or carer can lift each object and compare them at the same time and feel which one is heavier.

Then when you've measured them all, when you've weighed all three, we want you to put them in order from heaviest to lightest.

Alright, pause the video and have it go at that and then we'll come back together.

Wow, we hope that you enjoyed weighing those objects.

Just as much as we did, which object of yours was the heaviest? Can you hold up the heaviest object? Which object was the lightest? Way to go friends but we really hope you've enjoyed this lesson and hopefully you've taken some photos of your learning today.

We're sure that your teacher would love to see all of the amazing effort you've put in today.

And if you'd like Harold and I would love to see some of your learning.

So if you'd like you can ask a parent or carer to share the photos with us on our social media here at Oak.

Okay, well that's all we have time for today, I'm afraid, but we hope you had a great time and hopefully we'll see you next time.

Bye everyone.