Finding start or finish times
Find an unknown start or finish time from a given duration and the other clock time. Choose whether to move forwards or backwards, regrouping minutes at 60 when crossing an hour; a number line is one useful representation.
Lesson
Set out your lesson
“Finding start or finish times means practising the idea at the table with counters or paper models and one clear check. We will demo once, then your child tries.”
Bring to the table
- Ruler, cup, or clock as fits the topic
- Paper for recording
Extra for the adult
Worked example. Measure a pencil as about 15 cm and write the unit with the number.
Optional challenge. For Finding start or finish times, add one harder example after success.
What to notice. Keep one parent note: examples tried; results; support used. This session samples Finding start or finish times, not mastery.
Share and support
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Teaching approaches
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1 approach
Finding start or finish times means practising the idea at the table with counters or paper models and one clear check. We will demo once, then your child tries.
Materials: Ruler, cup, or clock as fits the topic; Paper for recording. Adult measures one example and records the unit. Child makes three measurements or time/money readings and records each with units. Done: three recordings with correct units. Stop after the fresh check; keep optional challenge for another day.
Family records and proof options
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Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Practice this concept
Start practiceFinding start or finish times practice
Practice key ideas from Finding start or finish times.
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Learning resources
Extra practice links — they do not replace Gakuva’s teaching approach.
BBC Bitesize · Practice link — not the full lesson
KS2 Maths
Before you open · source notes
KS2 Maths supports Finding start or finish times. An adult previews and guides; this is a learning page, not a scored quiz.
Free educational page, no sign-in required for the tested path.
Before you openAsk the learner one fact they learned and one question they still have.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public BBC Bitesize page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
BBC Bitesize. “KS2 Maths.” External page; Gakuva does not copy, host, embed, or redistribute materials.
Unknown — link only
Check understanding
- A film starts at 2:15 p.m. and lasts 47 minutes: find its finish time of 3:02 p.m.
- A show ends at 10:05 a.m. and lasts 45 minutes: find its start time of 9:20 a.m.
- Explain why a known start and duration require moving forwards, while a known finish and duration require moving backwards; check the result against the story
“If your child starts football practice at 3:20 p.m. and it lasts 75 minutes, can they find the finish time? If another practice finishes at 5:10 p.m. after 45 minutes, can they find when it started and explain the different directions?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Measurement
- Age range
- Ages 8–12
Standards