Math lesson plan · 4th grade (Year 5 in England) · 45 minutes
Convert units of length, mass, capacity and time
Measurement
CCSS 4.MD.A.1CCSS 4.MD.A.2England: Y4 MeasurementEngland: Y5 Measurement
Objective and success criteria
Students will: Convert units of length, mass, capacity and time.
- I can answer questions on today's skill on my own, without help.
- I can explain each step and say why it works.
- I can check my answer and spot a mistake.
Before and after
Needs first: Mass and capacity; Multiply by a one-digit number
Leads to: Convert metric units with decimals; Convert metric lengths: km, m, cm and mm
Materials: Rulers, scales and measuring jugs, Clock faces, Conversion chart, Mini whiteboards and pens, Printed student sheet (below).
Warm-up · 5 min
- Quick retrieval from earlier learning (Mass and capacity; Multiply by a one-digit number). Students answer on mini whiteboards.
- Show answers together and note who needs support in the main task.
- Zara puts 486 g of flour and 327 g of sugar in a bowl. What is the total mass in grams? → 813Prompt: Both amounts use the same unit, so you can add them.
- 26 × 6 = ? → 156Prompt: Split 26 into tens and ones: 20 + 6.
- Ben pours 618 ml of juice and 118 ml of water into a jug. How many millilitres are in the jug? → 736Prompt: Both amounts use the same unit, so you can add them.
Hook · 5 min
- Ask the class to estimate the length of the room or the weight of a bag before measuring it.
- Share the objective: Convert units of length, mass, capacity and time. Read the success criteria together.
I do: model it · 10 min
- Work through the example out loud, saying why you do each step, not just what you do.
- Example: 11 pounds = how many ounces?
- Step 1: 11 × 16 = 176
- Answer: 176
- Pause after each step and ask a student to say what comes next.
We do: guided practice · 10 min
- Do these together. Students try each step on whiteboards before you reveal it.
- Use the hints as prompts rather than giving the answer.
- 2 cm = how many mm? → 20Prompt: 1 cm = 10 mm.
- Write 447 cm in m and cm. How many whole m? → 4Prompt: How many 100s fit into 447?
You do: independent practice · 10 min
- Students work on the student sheet. Circulate and check the first two answers of every student early.
- Students who finish: write a question of their own for a partner, with the answer.
The 8 questions are on the student sheet below, with answers in the key.
Exit ticket · 5 min
- Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
- Write 962 cm in m and cm. How many whole m? → 9Prompt: How many 100s fit into 962?
- 7 m = how many cm? → 700Prompt: 1 m = 100 cm.
Watch out for
- Measuring from the end of the ruler instead of zero.
- Converting units the wrong way (multiplying instead of dividing).
Support and stretch
Support
- Review first: Mass and capacity.
- Use concrete materials: rulers, scales and measuring jugs.
- Give the first step of each question, or a partly worked example to finish.
- Pair with a confident partner for the guided practice.
Stretch
- Move on to: Convert metric units with decimals; Convert metric lengths: km, m, cm and mm.
- Explain a common mistake in writing and how to fix it.
- Write a word problem that uses today's skill, then solve a partner's.
Homework and more practice
Free online practice with hints and printable worksheets for this skill: eurekami.com/math/grade-4.
Free lesson plan from eurekami.com/lesson-plan-builder