Measures Comparing and measuring lengths Objectives Day 1

Measures Comparing and measuring lengths Objectives Day 1 Measure length using a uniform unit Measure using decimetre strips. Day 2 Estimate and measure length using a uniform unit. Measure using centimetres. Understand there are 10 cm in a decimetre. Day 3 Measure and estimate by comparing with a metre stick. Measure using rulers measured in centimetres and metres. © hamilton-trust. org. uk 1 Year 1/2

Measures Comparing and measuring lengths Short Mental Workouts Day 1 Numbers before and after. Day 2 How many? Day 3 Which unit? © hamilton-trust. org. uk 2 Year 1/2

Measures Comparing and measuring lengths Short Mental Workout Numbers before and after © hamilton-trust. org. uk 3 Year 1/2

Measures Comparing and measuring lengths Short Mental Workout How many? © hamilton-trust. org. uk 4 Year 1/2

Measures Comparing and measuring lengths Short Mental Workout Which Unit? © hamilton-trust. org. uk 5 Year 1/2

Measures Comparing and measuring lengths Objectives Day 1 Measure length using a uniform unit Measure using decimetre strips. © hamilton-trust. org. uk 6 Year 1/2

Day 1: Measure length using a uniform unit; Measure using decimetre strips. Choose a child to lie down at the front and discuss how long s/he is and how we could check. Could we use centimetre cubes? We would need lots of cubes! © hamilton-trust. org. uk 7 Year 2

Day 1: Measure length using a uniform unit; Measure using decimetre strips. Each strip is 10 cm long. Use 10 cubes to check… We can use these decimetre strips… Let’s put our estimates on the flipchart before we check. How many decimetre strips long is our volunteer? © hamilton-trust. org. uk 8 Year 2

Day 1: Measure length using a uniform unit. Talk to your partner. How many cubes high do you think the chair will be? © hamilton-trust. org. uk 10 Year 1

Day 1: Measure length using a uniform unit. Make a tower of cubes to measure the height of the chair: use towers of 10 and then single cubes. Werecount you close? Let’s in 10 s Was it or less then 1 smore to measure than you the height of the imagined? chair. © hamilton-trust. org. uk 11 Year 1

Day 1: Measure length using a uniform unit. Look around the Can room. you. Can seeyou anything find something shorter than that the might be shorter chair? than the chair? Use towers of cubes to check. © hamilton-trust. org. uk 12 Year 1

Day 1: Measure length using a uniform unit. Look around the Try to estimate the room. Find some length before other things to measuring it. . . measure. Remember to use towers or snakes of cubes to check. © hamilton-trust. org. uk 13 Year 1

Challenge © hamilton-trust. org. uk 14 Year 1/2

Measures Comparing and measuring lengths Objectives Day 2 Estimate and measure length using a uniform unit. Measure using centimetres. Understand there are 10 cm in a decimetre. © hamilton-trust. org. uk 15 Year 1/2

Day 2: Estimate and measure length using a uniform unit; Measure using centimetres. Understand there are 10 cm in a decimetre. Use a 20 -bead string to measure a child’s hand span. How many beads wide is it? © hamilton-trust. org. uk 16 Year 1

Day 2: Estimate and measure length using a uniform unit; Measure using centimetres. Understand there are 10 cm in a decimetre. Record the hand span measurement on a sticky note. Amy 11 beads © hamilton-trust. org. uk 17 Year 1

Day 2: Estimate and measure length using a uniform unit; Measure using centimetres. Understand there are 10 cm in a decimetre. Work in pairs to measure each other’s hand spans. Write your name and hand span on sticky notes then stick them on the flipchart. © hamilton-trust. org. uk 18 Year 1

Day 2: Estimate and measure length using a uniform unit; Measure using centimetres. Understand there are 10 cm in a decimetre. Work together to put the hand spans in order: smallest at the bottom and largest at the top. 11 beads 10 beads 8 beads 10 beads 9 beads 11 beads Put any identical measurements alongside one another. © hamilton-trust. org. uk 19 Year 1

Day 2: Measure using centimetres. Understand there are 10 cm in a decimetre. It is divided into 10. Each section is 1 centimetre so it is 10 centimetres long. This is the decimetre strip we used yesterday… Put your finger on one space on the decimetre strip. One centimetre is about one finger wide! A centimetre is a very small unit and is useful for measuring smaller things. It is used to measure things by people all over the world. It is always the same! © hamilton-trust. org. uk 21 Year 2

Day 2: Measure using centimetres. Understand there are 10 cm in a decimetre. Hold up the drawing of the outline of your foot. Ask children to estimate how many centimetres long they think your foot is. Put some of the children’s suggestions on the flipchart. Demonstrate measuring the length of your foot to the nearest whole cm using several paper decimetre strips and cutting the last one to the exact length. Be sure to count in 10 s and 1 s, not just 1 s. © hamilton-trust. org. uk 22 Year 2

Day 2: Measure using centimetres. Understand there are 10 cm in a decimetre. How might we measure the outline of a foot? Discuss and model using string to follow the curves, then straighten to measure with the decimetre strips. © hamilton-trust. org. uk 23 Year 1/2

Challenge © hamilton-trust. org. uk 24 Year 1/2

Measures Comparing and measuring lengths Objectives Day 3 Measure and estimate by comparing with a metre stick. Measure using rulers measured in centimetres and metres. © hamilton-trust. org. uk 25 Year 1/2

Day 3: Measure and estimate by comparing with a metre stick; Measure using rulers measured in centimetres and metres. Take children to the hall and pass metre sticks around, encouraging children to look at the centimetre markings. Explain that these are 1 metre long. How many centimetres are in 1 metre? Challenge children to suggest how many metres long they think the hall might be. © hamilton-trust. org. uk 26 Year 1

Day 3: Measure and estimate by comparing with a metre stick; Measure using rulers measured in centimetres and metres. More than 100 m More than 2 m More than 10 m Less than 10 m © hamilton-trust. org. uk 27 Year 1

Day 3: Measure and estimate by comparing with a metre stick; Measure using rulers measured in centimetres and metres. Get children to work together to lay metre sticks along the hall. Problem solve if you run out of metre sticks… … put a marker to show, for example, where 5 metres come to then reuse the sticks to continue measuring. © hamilton-trust. org. uk 28 Year 1

Day 3: Measure using rulers marked in centimetres and metres. Show the class a 30 cm ruler and show that it is the same length as 3 decimetres by laying 3 decimetre strips along the ruler. Can you see anything in the classroom that might be shorter than 10 cm? Give each child a 30 cm ruler and ask them where 10 cm come to on it. © hamilton-trust. org. uk 30 Year 2

Day 3: Measure using rulers measured in centimetres and metres. © hamilton-trust. org. uk

Day 3: Measure using rulers marked in centimetres and metres; Compare measurements. Children use their 30 cm ruler. They suggest objects that may be less than 10 cm. Repeat for items longer than 10 cm but shorter than 30 cm. Check lengths using the rulers: line up the 0 and read the markings accurately. Then look for items longer than 30 cm but less than 100 cm. Then items longer than 100 cm. Complete the table as you go. © hamilton-trust. org. uk 32 Year 2

Challenge © hamilton-trust. org. uk 33 Year 1/2

Measures Comparing and measuring lengths Well Done! You’ve completed this unit. Objectives Day 1 Measure length using a uniform unit Measure using decimetre strips. Day 2 Estimate and measure length using a uniform unit. Measure using centimetres. Understand there are 10 cm in a decimetre. Day 3 Measure and estimate by comparing with a metre stick. Measure using rulers measured in centimetres and metres. © hamilton-trust. org. uk 34 Year 1/2

Problem solving and reasoning questions Year 1 and Year 2 Draw a fairly wiggly line of about 4 decimetres in length. Lay a piece of damp string along it. Straighten the string. Y 1: How many cubes long is it? Y 2: How many centimetres long is it? © hamilton-trust. org. uk 35 Year 1/2

Problem solving and reasoning answers Year 1 and Year 2 Draw a fairly wiggly line of about 4 decimetres in length. Lay a piece of damp string along it. Straighten the string. Y 1: How many cubes long is it? 40 cubes (depending on cube size) Y 2: How many centimetres long is it? around 40 cm © hamilton-trust. org. uk 36 Year 1/2

Problem solving and reasoning questions Year 1 Find a book which is… 9 cubes long more than 16 cubes long between 10 and 12 cubes long Year 2 Estimate how long each of these creatures is in cm, nose to tip of tail: • a mouse • a worm • a gold fish in a bowl Use an online resource to check… © hamilton-trust. org. uk 37 Year 1/2

Problem solving and reasoning answers Year 1 Find a book which is… 9 cubes long more than 16 cubes long between 10 and 12 cubes long Various answers, check, ask children to demonstrate. Year 2 Estimate how long each of these creatures is in cm, nose to tip of tail: • a mouse around 8 to 10 cm, some species longer • a worm can be up to 36 cm! • a gold fish in a bowl © hamilton-trust. org. uk around 10 cm 38 Year 1/2