Today our question is right here on the board: What is your favourite fruit: apple, banana or orange? You already know how to ask a question and collect answers, so now we get to count them. Every time a hand goes up, we make one little tally stroke. And here is the clever part: on every fifth answer, we lay one stroke right across the other four, like a gate on a field. Ready to count?

The interactive builds up three tally rows on screen, one vote at a time. Watch how the strokes get bundled as each new vote comes in, and see if you can read the total before it appears.

Today we build a tally together as the answers come in. One pupil adds each stroke at the board, and everyone else has a job too: after each stroke goes up, we all say the new running total aloud together. We start with four strokes, then the gate on the fifth, then a seventh, and keep going to a whole row of twelve. That way we always know where we are.