A bus from Gaillimh to Salthill leaves at 9:10 and arrives at 9:45. How long did that journey take?
Have a think: what would you count first to work it out?
Take three hands-up answers, not open call-outs. Listen for anyone who counts on from 9:10 rather than trying to take one time from the other — revoice that method as the one we will build on today.
Here is a real Irish Rail timetable, Cork to Dublin. Each column is one train; each row is a stop. The 07:00 train from Cork (Kent) reaches Dublin Heuston at 09:35.
Watch how we work out a journey time by counting on. First we hop from the start time up to the next whole hour. Then we count the whole hours. Last we count the final few minutes. We'll do this for three journeys, so notice which ones cross an o'clock along the way.
Work each journey aloud as a count-on, not a take-away. On the first, land on 08:00 and 09:00 as stepping stones before the final 35 minutes — hop to the next o'clock first. On the third, ask the class to predict the Portlaoise hop before you tap it; both trains take the same 35 minutes, so the same distance apart gives the same journey time whatever the clock reads. Keep the whole-hour landmark in view throughout.
Name a departure and an arrival before anyone taps. The class counts on aloud and commits to an answer, then a pupil taps the two cells and the journey time appears — use it to confirm the count, not to replace it. Rotate four pupils, keeping the last one on a journey that crosses an hour.
In your maths copy, use the printed timetable to write the journey length for these three services on the 07:00 train. Show your count-on jumps for each one, like this:
Now write the two jumps and the total for each of these:
Walk the room glancing at whether pupils split the count at the next o'clock — this is whole-class copybook practice, not marking. Nudge anyone who writes only a total to show the two jumps that got them there. The three journeys give shared answers to check against: Mallow to Thurles is 55 min, Limerick Junction to Heuston is 1 h 40 min, Cork to Mallow is 20 min.
Read each challenge aloud and give the class a moment to count on before anyone taps. The first two stay inside one hour; the third crosses eight o'clock and the fourth runs over an hour, so the count-on-to-the-next-o'clock method starts to earn its keep. Use the Check as narration: "yes, that's it". The two extension journeys are there for fast finishers.
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