00–09 seconds Question: How many benches are in practice area A? 09–18 seconds Evidence: The practice observation says two benches. I make one tally mark for each bench: | |. 18–27 seconds Explain: Two marks give a total of 2 benches. I record this in the A row. 27–36 seconds Check: Count the marks again. This is a practice example; our real grounds may differ. Original silent 36-second captioned model of a practice tally. It does not show real school fieldwork.