Think about the school library over one whole week. Some days it is busy and lots of books go out; other days it is quiet. If we drew a bar chart of the books borrowed each day, which day do you think would have the tallest bar, and which day the shortest? How could a chart show you the busiest day in a single glance, without counting anything?

Four charts to look at, one after another. For each one, watch how we run a finger from the very top of a bar straight across to the number scale to read it. When the top of a bar sits between two numbers, we start at the line below it and count the small steps up. The last chart asks a 'how many more' question, so be ready to say which two bars we compare.