Measurement Review

Overview

Today’s lesson reviews Year 3 measurement using hands-on tasks with labelled instruments and familiar metric units. Students measure, record and compare lengths, masses and capacities, using estimation first and then precise measurement.

Learning intentions

• WALT measure and compare objects using familiar metric units of length, mass and capacity.
• WALT choose appropriate metric units and instruments, and use labelled markings to read measurements accurately.
• WALT estimate before measuring, then explain how the measurement compares with the estimate.

Success criteria

• I can choose the right unit (centimetres, grams, millilitres) and instrument for the task.
• I can measure carefully using the instrument markings and record a number with the correct unit.
• I can compare two measurements and explain which object is longer/heavier/holds more and by how much.
• I can check whether my estimate makes sense by comparing it to the measured result.

Curriculum links

• Measurement — students measure and compare objects using familiar metric units of length, mass and capacity, and instruments with labelled markings.
• Measurement — students identify which metric units are used to measure everyday items and use measurements to make estimates.
• (Review focus across the unit) Students apply measurement reasoning in real contexts by estimating, measuring and comparing.

Lesson structure (60 minutes)

1. 0–6 min · Hook and model. Teacher shows three items (e.g., ruler-measured strip, small container, bag of dry snack) and asks: “Which unit will we use: cm, g, or mL? Why?” Students do a quick think-pair-share and share one reason.

2. 6–14 min · Mini direct teach: reading instruments. Teacher demonstrates how to start at zero, align the object correctly, and read the last visible marking (e.g., ruler to the nearest 1 cm; scale in grams; capacity using mL markings). Students follow along with a “spot the mistake” checklist on their worksheet (no measuring yet).

3. 14–16 min · Explain stations and safety. Teacher introduces three stations and how to rotate. Students repeat the routine: estimate first, measure second, record third, compare fourth.

4. 16–34 min · Station rotation: Length (cm). Teacher runs Station 1: students use rulers/measuring tapes to measure a set of objects (e.g., bookmark, cardboard strip, classroom item). Students estimate in centimetres, measure, record the number and unit, then compare to a partner’s object (e.g., “Mine is 5 cm longer”).

5. 34–50 min · Station rotation: Mass (g) and Capacity (mL). Teacher runs Station 2 (mass): students estimate grams, weigh items on a digital scale, record in grams, then compare which is heavier. Teacher runs Station 3 (capacity): students estimate mL using a measuring jug/cylinder, pour carefully, read at the bottom of the meniscus where possible, record mL, then compare which container holds more.

6. 50–57 min · Whole-class discussion: comparing and justifying. Teacher projects one student example (or uses sample data) and prompts: “How do you know your estimate was close? What would you do differently next time?” Students share one comparison statement using measurement language.

7. 57–60 min · Exit ticket. Students complete 3 short items: (a) choose the correct unit for a scenario, (b) write one measurement with a unit, (c) compare two given results in cm/g/mL.

Resources

• Classroom rulers (centimetre markings) and/or measuring tapes
• Digital scales with grams (g)
• Measuring jugs or graduated cylinders with millilitres (mL)
• Object set cards for each station (length strips, mass items, capacity containers)
• Measuring record sheets (estimate, measured value, unit, comparison sentence)
• “Reading instruments” checklist poster/handout
• Clipboards/pencils
• Sample data card for discussion
• Exit ticket slips

Assessment

• Teacher observation during stations: correct instrument choice, correct starting point (zero), and accurate reading of labelled markings.
• Record sheets checked for: estimate vs measured value, correct unit notation (cm, g, mL) and comparison sentences.
• Exit ticket for quick evidence of understanding unit choice, measurement recording, and comparing.

Differentiation

• Support for students needing extra scaffolding:
• Provide sentence starters: “I estimated ___ mL but it was ___ mL.” / “It is ___ cm longer because…”
• Give a ruler-with-highlighted end marker and a “place your object here” guide line.
• Offer measurement cards with units already printed, so students only write the number.
• Target misconceptions:
• Remind: “Units go with numbers” and “Start measuring from zero.”
• Model how to line up the object so measurements are not taken from an edge that is not aligned.
• Extension for students ready for more challenge:
• Ask students to measure an object twice and record both results, then state which is more reliable and why (focus on accuracy and consistency).
• Add a “compare by difference” requirement: “How much longer/heavier/holds more?” (difference in the same unit).
• EAL/SEN considerations:
• Use visual supports (icons for ruler/scale/jug) and consistent language stems.
• Keep tasks tactile and concrete; allow peer assistance with roles (measurer, reader, recorder).