Half Past Digital

Overview

In this lesson students learn to read and write the time half past the hour on digital clocks. They will practise converting between an analog clock (hands) and a digital time display.

Learning intentions

• Students will be able to read digital clock times that show :30 (half past).
• Students will learn to write digital times for half past.
• Students will use an analog clock to help convert to digital time.

Success criteria

• I can read a digital clock that shows :30 and say the time in words.
• I can write the digital time for half past the hour.
• I can match analog clock times to the correct digital time.

Curriculum links

• Reading and using common features of the number system to represent time through whole numbers and two-digit times.
• Using everyday measurement of time to tell and record time accurately.
• Creating and using simple representations to communicate mathematical thinking.

Lesson structure (30 minutes)

1. 3 mins – Warm-up: “Clock Says”

• Teacher shows 3 quick digital times (e.g., 1:00, 1:30, 2:30). Students do a silent finger signal (thumb up for times that are half past).
• Prompt: “Which ones are half past? How do you know?”

2. 7 mins – Teach: Convert half past

• Teacher draws an analog clock on the board: minute hand on the 6, hour hand on the middle (half past).
• Teacher says and models: “When it is half past, the digital clock shows :30.”
• Repeat with two example hours (e.g., 3:30 and 7:30), modelling how to write in digital format.

3. 10 mins – Hands-on practice: Match & Build

• Students work at tables with a set of cards:
• Analog clock cards (with hands at half past)
• Digital time cards (e.g., 4:30, 5:30)
• Task: Match each analog card to the correct digital card, then place the matching pair into a “Half past” sorting tray.
• Teacher circulates with prompts: “What do you notice about the minute hand?” and “What numbers do you see on the digital clock?”

4. 7 mins – Whole-class check: Digital write

• Show 6 digital clocks one at a time using the board or chart.
• Students write the time on mini whiteboards (for example: 2:30, 6:30).
• Quick review: call on 3 students to read answers aloud; teacher confirms correct format and wording (“two thirty”, “six thirty”).

5. 3 mins – Exit ticket: One analog to digital

• Each student gets one analog clock showing half past a chosen hour.
• They write the digital time on a card and hand it in.
• Teacher quickly scans for who needs support with the :30 idea.

Resources

• Analog clock template cards (minute hand at 30 minutes / “half past” position)
• Digital time cards showing times ending in :30
• “Half past” sorting trays or envelopes
• Mini whiteboards and markers (or paper + pencil)
• Teacher clock model (real or magnetic clock)
• Digital display images or printed clock faces (large enough for the board)
• Exit ticket cards with one analog clock each
• Visual reference chart: “Half past =:30” with one worked example
• Student data/record sheet (teacher quick notes for assessment)

Assessment

• Formative: teacher observation during matching and table work (correct pairing and correct digital format).
• Formative: mini whiteboard responses during the whole-class “Digital write” section.
• Summative-for-this-lesson: exit ticket identifying whether students can convert analog half past to digital time.

Differentiation

• Provide a time reference chart at each table showing one example of half past (analog and digital together).
• Use sentence starters for EALD students: “It is __ o’clock half past.” “The digital time is __:30.”
• For neurodivergent learners, keep tasks structured and predictable: small batches of cards, clear “match then sort” steps, and movement breaks during rotation.
• Support students who need it with partially completed digital frames (e.g., “4:__” where students only fill in the missing “30” or “0” as appropriate).
• Extension for advanced learners (if time allows within the practice): include a small extra set of analog cards where the hour differs more (e.g., 1:30, 9:30) and ask students to explain how they know it is half past (minute hand at the 6).
• Allow multimodal responses: students may point to the correct digital card first, then write the time.

Extension (optional)

• Create a quick class quiz: students choose 3 analog half-past times to turn into digital questions for classmates. They write each question card as “What time is it?” with an analog clock image showing half past.