﻿Hello. My name is Mrs. Behan, and for this lesson I will be your teacher. I need your help in this lesson. I want you to help me put together my next school trip. I know that you are really good at reading time on a clock to the nearest minute, you understand digital clocks, and you can work out how much time has passed between the start and the end of an event. Let's start by looking at the lesson agenda. We're going to look at the trip ideas first, then you're going to help me plan the trip. Along the way, you will solve time related problems. And at the end of the lesson there will be an independent task for you to have a go at. I know you'll be keen to find out how you got on, so I will go through the answers with you. There are just a couple of things you will need to take part in the lesson. Something to write with, so a pencil or a pen, and something to write on. If you haven't got those things to hand, just pause the video here whilst you go and get them. Remember, try to work somewhere quiet where you won't be disturbed. So if you were planning a school trip, where would you take your class? Well, I've decided to take my class to this beautiful country park. We can learn about trees, we can go see some animals, we can look at wildlife, do some minibeast hunts and play some games in the grass. Here are some ideas that I came up with. Having a picnic lunch. Who doesn't love having a picnic lunch? We can sit out on the grass on some blankets and eat our lunch there together. We can also have a tour of the butterfly house. The butterfly house at this place doesn't just have butterflies, it has all sorts of different creepy crawlies for us to have a look at. And a trip to the park wouldn't be the same if we didn't have time to play on the playground, so we would like to fit that in somewhere, too. Those are just some of the ideas. I might change my mind along the way. Are you ready to help me? Okay. Well, here's my first problem. I know that... Well, I don't know what time I've got to leave school, but I know I need to arrive at the part at 25 past nine. How long does it take me to get there? Well, it takes half an hour to get from the school to the park. So I need to know what time to leave so that we make it on time. So how are we going to work it out? Well, it says it takes half an hour. How many minutes is in half an hour? That's right, 30 minutes. So we need to look back on the clock to find out what 30 minutes is before 25 past nine. So we know that it's 30 minutes from school to the park. We're going to use a timeline. So on our timeline we need to plot our start and end times. Well, we don't have all of the information that we need to do that. We only have our end time, 25 past nine, or 9:25 a.m. Can you remember what a.m. stands for? A.m. means ante meridiem, before midday, so it's in the morning. We then need to mark on the o'clock times in between. Well, we don't know when it starts, but we do know that half an hour is going to be before 9:00, and we can see that looking at our analogue clock. Half of the way round will take us up here, so we know that we're just going to go past 9:00. So I can pop 9:00 a.m. onto our timeline. So we now need to work out the distance. Well, like I've just shown you on the clock, if we look at the gap here between 9:00 a.m. and 9:25, we can see it is 25 minutes. But we haven't made it half an hour yet, so there are 25 minutes between 9:00 a.m. and 9:25 a.m. So we need to go back another five minutes to make 30 minutes in total. So that takes us to 8:55 a.m. So what time do we need to leave school to arrive at the park on time? That's right, we should leave school at five minutes to nine. Can you remember what the digital format is? 8:55 a.m. Fantastic, we've solved our first problem. Okay. Something I'd like you to think about now. The butterfly house opens at 10:30 a.m. How long do we need to wait if we arrive at 9:25 a.m. Pause the video here whilst you have a think. You might want to use a timeline. So did you work it out for us? Okay, let's have a look together. So we're going to draw out our timeline, and job number one is to put the start and end times on. Do we have that information? Well, we know what time the butterfly house opens up, which is at 10:30. That's the later time, so I've put that over here. We know what time we arrive at, 9:25, so I've put that over there. So our job now is to find out that gap between the times. What was the second job? We needed to work out what the o'clock would be that we pass. So which hour will we fully complete before we start the next one? Which time will it be? Well, it will be 10:00 a.m., which is pretty much in between 25 past nine and half past 10. So we now have two segments of time, two intervals to work out. From 25 past nine to 10:00, the time is 35 minutes. The time interval is 35 minutes. And nice easy one now, between 10 and 10:30, it's 30 minutes. Let's combine that total to work out how many minutes we have to wait for. 35 minutes plus 30 minutes is equal to 65 minutes. Let's convert that now into hours and minutes. We know that 65 minutes is equal to one hour because it's 60 minutes, plus five minutes. So we know that we need to wait for one hour and five minutes. Here is a different way that you might've worked out that time interval. So I've still started with a timeline. We know what time we have arrived, at 9:25, and we know what time the butterfly house opens, at 10:30. We're going to pop our o'clock in there. Well, we pass 10:00, so we pop it in the middle. This time, I know that one hour will take me from 9:25 until 10:25. So I've drawn a lovely long curved line here that takes me almost to 10:30 because I know 10:25 is very close to 10:30. It's actually just five minutes away. That's much easier for me to combine the times now. So I can see straight away that we need to wait for one hour and five minutes. Because you are so good at reading time on an analogue clock and a digital clock, I was hoping you could help me with this activity. I would like you to pause here whilst you match the analogue clocks to one of the digital clocks. Do those first. Once you've done that, I would like you to decide which order we should do these things in. So we want to have an ice cream, we want to depart, which means to head back to school, and we want to have lunch. So can you choose sensible times to do those events? Pause here whilst you have a go. When you're ready, come back to me and we'll look at what we've chosen. Okay then, so you've had a go at matching up the analogue clocks to the digital clocks. Let's see how you got on. So our first clock actually shows quarter to two, or in digital time we can say 1:45. 45 minutes have past the hour. So on our digital clock we can see 1:45. What does this time show? Well, this time shows 12:35 p.m. Have you noticed that they all say p.m.? Are we doing it in the morning or the afternoon? Well, this is post meridiem. It's in the afternoon, after midday. So we've got 25 minutes left to go until 1:00. Or on here, which shows us 35 minutes have past 12:00. So our last two clocks match like this. What is the time shown? That's right, it is 2:17 p.m. 17 minutes have past 2:00. So did you decide which events to do at which times? Let's start with 12:35 p.m. Do you think the children will want to have an ice cream, depart, or have lunch? Well, I think the children will want to have lunch at this point. We know that 12:35 is 35 minutes past midday, 12:35 p.m., so they will probably be hungry and ready for their lunch that we are going to have on the grass as part of a picnic. What do you think we should do at 2:17 and 1:45? Well, at 2:17, this seems like a sensible time to depart. If we left at 2:17, and how long does it take us to get from school to the park, can you remember? That's right, it took us half an hour. So if it takes us around about half an hour again, we will be back at just before 10 to three, which sounds like a good time to get back to school before going home. So we will probably leave the country park at 2:17 p.m., which means 1:45 is perhaps the best time of the day. At 1:45 p.m., we will go and buy ice creams. My class will have a great time on that trip that you have helped plan. Thank you very much. You're now ready to have a go at the independent task, applying everything you know about time into word problems. So have a go at solving these word problems. Problem one. Aisha puts a cake in the oven at 9:25 a.m. She lets it bake for 40 minutes. What time is the cake ready? Problem two. Ali wakes up at 7:30 a.m. It takes him 50 minutes to get ready. What time is he ready for? Problem three. So the train to Manchester leaves at 11:53 a.m. It takes 50 minutes to get there. What time does the train get to Manchester? Problem four. The class were given 45 minutes to do the test. Abdul finished 10 minutes early. How long did it take him to finish his test? And problem five. The film started at 1:35 p.m. and it finished at 3:02 p.m. How long was the film? Pause the video here whilst you have a go at your task. When you're ready, come back to me and we will look at the answers together. Okay then, how did you get on? Did you manage to work out what time the cake is ready? Well, the cake will be ready at 10:05 a.m. What time is Ali ready for? He wakes up at 7:30, it takes him 50 minutes to get ready. Well, I know it's 30 minutes from 7:30 till eight, and then another 20 minutes to make up the 50 minutes, so that means Ali will be ready at 8:20 a.m. What time does the train get into Manchester? So the train to Manchester leaves at 11:53 a.m. and it takes 50 minutes to get there. So it arrives at 12:43. And I can check my answer because I know 60 minutes past 11:53 would be 12:53, and 50 is 10 less than 60, so I can take off 10 minutes. So that gives me the answer of 12:43 p.m. The class were given 45 minutes to do the test. Abdul finished 10 minutes early. So how long did it take him to finish his test? Well, 10 less than 45 is 35, so Abdul finished the test in 35 minutes. The film started at 1:35 p.m. and it finished at 3:02 p.m. How long was the film? The film was one hour and 27 minutes long. I'm sure that you have drawn a timeline to help you work that out. If you'd like to, please ask your parents or carer to share your work on Instagram, Facebook, or Twitter, tagging @OakNational, @LauraBehan21, and #LearnwithOak.

How confident are you in solving time related problems? Have a go at the quiz to test our your knowledge.

What unit of time would you use to measure a children's TV programme?

The ice cream shop served ice cream for 5 and a half hours.  It opened at 10:00am. What time did it close?

The last film at the cinema started at 09.45pm.  The film lasted 1 hour and 45 minutes.  What time did the cinema close?

It takes 57 minutes to get the train from Blackburn to Manchester.  I need to get to Manchester for 11.30am.  Will I be early or late if I got the train from Blackburn at 10:35am?

My friend bought me a ticket to see a football match.  Kick off was at 03:00pm.  The match lasts for 90 minutes and has a 15 minute break.  What time did the game finish?

Further Applying Knowledge of Time to Solve Problems Quiz

In this lesson, we will solve time related problems including reading from analogue clocks, counting backwards to find suitable departure times for trips, and planning timetables for events.

Maths

Y3 Maths

Key Stage 2

Year 3

Further applying knowledge of time to solve problems

Time

Number

THEME

UNIT

Understanding that clocks have more than one scale

Reading analogue time to the nearest minute

Telling the time to am and pm

Telling 'minutes past' on a digital clock

Reading and ordering time (presented in different ways)

Exploring units of measured time

Measuring time in seconds

Calculating and comparing intervals of time

Applying knowledge of time to solve problems

What is a.m. short for?

What is p.m. short for?

If Mrs Behan could say 'elephant' 23 times in 20 seconds, roughly how many times could she say 'elephant' in one minute?

Which unit of measurement would you choose if you took a flight to China?

Which interval of time is longer?

Which interval of time is shorter?

Lesson overview:Further applying knowledge of time to solve problems

Core Content

Time: