Metric & Imperial Conversion
Understand and use approximate equivalences between metric units and common imperial units (inches, pounds, pints)
Share and support
Teaching Table
Set out your lesson
Estimate between metric and common imperial measures, naming the unit system and the approximation.
Use mt_Zks8xyInSG first. Ask the learner to explain that a unit conversion does not change the underlying amount.
Check learner readiness directly; prerequisite availability is not attainment.
Pencil and plain paper, or this screen and an oral explanation. No purchases, food, scissors, weighing or real journey needed.
Choose one short sitting or stop after Together and return later. Read the model aloud, invite the learner to try, then put Show and Together aside for Try. Keep adult keys closed and out of view.
No printer: show only the active learner sheet; copy the supplied grid/table or draw on plain paper. An adult may read exact prompts or scribe the learner’s own words without adding a method; record that support. Oral work is mathematical evidence, not handwriting evidence.
Use fictional quantities. No names, addresses, body measurements, accounts, family records or purchases are required. A learner can pause or decline a context.
Ask what stays the same, which unit is being counted, and what operation fits. Let the learner explain before helping. If stuck, return to the worked model, then retry; record the help rather than calling it independent.
Use fictional quantities. No names, addresses, body measurements, accounts, family records or purchases are required. A learner can pause or decline a context.
Record actual responses, access mode and assistance; never invent observations or infer mastery.
Use the complete materials on screen or print only the current sheet. Keep adult guidance out of learner view. Retain an earlier model only when the current step supplies it as context.
Teaching limits and safe use
These are finite task opportunities, not proof of mastery. Record what was attempted and what support was used.
Finite task opportunities do not establish general mastery. Exact canonical examples are rehearsal when previously modeled. No timed testing or forced personal disclosure.
Approximate factors are task references, not medical advice or precision measuring instructions. The canonical pint relation is interpreted as UK imperial; using it for US liquid pints would be wrong.
Use fictional quantities. No names, addresses, body measurements, accounts, family records or purchases are required. A learner can pause or decline a context.
Record actual responses, access mode and assistance; never invent observations or infer mastery.
Family records and proof options
Keep a record of your learning
Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Learning resources
Reviewed external links that reinforce this concept. They do not replace Gakuva’s teaching approach.
No reviewed resources for this concept yet.
The teaching approach above still stands. Curated practice links will appear here as the shelf fills.
Check understanding
- State that 1 inch ≈ 2.5 cm and use this to estimate length in inches
- Know that 1 kg ≈ 2.2 pounds and estimate a person's weight in pounds
- Convert approximately between litres and pints (1 litre ≈ 1.75 pints)
“If your child hears that a baby weighs 7 pounds, can they give a rough idea of that in kilograms — using the approximate conversion they know?”
Curriculum record
- Type
- Conceptual
- Subject
- Mathematics
- Domain
- Measurement
- Age range
- Ages 9–10