12-hour and 24-hour time

MathematicsMeasurementAges 8–9

Read, write, and convert time between analogue and digital 12-hour and 24-hour clocks

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Teaching Table

Set out your lesson

Convert 12-hour and 24-hour times while handling noon and midnight correctly.

Activity

Inferred, not a taxonomy edge: learner can access the supplied prompt with agreed support and can explain or mark a response. If earlier skills are unfamiliar, use the prerequisite topic for teaching; an authored prerequisite is not proof this learner is ready.

Sequence

Keep the two adult-only cards off the learner screen. Have a pencil and scrap paper if useful; oral pointing/typing/AAC can replace handwriting unless spelling or composition is the target. No printing, cutting, account or purchase is required.
Open Show first, read the explanation together, and pause to check the central idea. Then do Guided Try together.
For Try, close earlier models and the adult keys unless the task explicitly supplies a reference. Record any hints, read-aloud help or model reopening; do not call supported work independent.
Use only the active learner card. Keep the private key closed until an attempt is recorded. Stop or take a break on request; practical claims stay not observed unless actually done.

No Printer

Use on screen; read aloud or recreate a tactile model only with declared support. No printer or purchased kit.

Privacy

Never display adult keys or dictation spellings with a learner task; no family financial, identity or conflict disclosure.

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.

No time zones, dates across midnight, or real travel timetable advice.
These bounded examples do not establish independent performance in other situations. Record the support used.

Never display adult keys or dictation spellings with a learner task; no family financial, identity or conflict disclosure.

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Convert 12-hour and 24-hour times while handling noon and midnight correctly.

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Learning resources

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Check understanding

Convert 3:45 pm to 15:45 in 24-hour time
Read 19:30 and state the 12-hour equivalent as 7:30 pm
Match a set of 12-hour and 24-hour times

“If a train timetable shows a departure at 14:35, can your child convert that to 12-hour clock time — and tell you whether that's morning or afternoon?”

Curriculum record

Type: Procedural
Subject: Mathematics
Domain: Measurement
Age range: Ages 8–9