Explicit teaching — I Do (~15 min)
1. 12- and 24-hour time WA6MMGN1
Model converting between the two systems: 1:30 pm = 13:30; 9:00 am = 09:00; midnight = 00:00. Use a clock to show the afternoon "add 12" idea.
2. Duration
3. Timetables
Display a bus or train timetable; model reading a departure and arrival and finding the journey length.
Guided practice — We Do (~20 min)
- Convert together. The class converts a set of times both ways between 12- and 24-hour formats.
- Duration jumps. Find several durations using the number-line jump strategy, including some that cross midday.
- Read a timetable. Using a real timetable, answer "which train arrives by 9:00?" and "how long is the 08:15 service?" as a class.
- Plan a mini-itinerary. Order a short day's events and total the time.
Independent practice — You Do (~15 min)
Worksheet/task:
- convert between 12- and 24-hour time;
- calculate durations of events (including some that cross the hour and midday);
- read a provided timetable to find journey times and the best service to catch;
- plan a simple half-day itinerary and total its duration.