(gentle instrumental music) <v ->In this Year-Five lesson from the Human Development Unit,</v> pupils analyse data they have collected to develop their substantive knowledge about how human height changes during childhood. Prior to this, pupils investigated human height by measuring children of different ages, calculating the mean average height for each age group, and plotting the results on a line graph. In this lesson, the teacher guides the pupils as they carefully examine their line graphs to identify patterns in their data. They are encouraged to engage in high-quality dialogue to explain what the lines on their graphs show. <v ->Did she measure any children at the age of zero?</v> <v ->No. </v> <v ->No, so she doesn't have</v> a data point. Not on there. D'you think we could maybe, like we have been doing, follow that line up to there? Then I would come across like this, and then we could predict that our seven-year-old is likely to be 118 centimetres tall. <v ->This video shows pupils as active participants,</v> working scientifically and purposefully, using their line graphs to analyse data about human height and make predictions for further values. In doing so, they develop their disciplinary knowledge of reporting and presenting findings from their inquiries and use line graphs to make predictions. <v ->The way how I would work it out</v> is I would find the halfway between eight and 10, and then I would draw a line up, and when it touches the line, I would put it and do a little x, I would move my sheet around, I would make a line across, and then I would find mean average is 130 centimetres. <v ->Now that pupils have used line graphs</v> to analyse data on human height during childhood, they should consider how the line on their graph might change if they continued by measuring the heights of adults of different ages. It is important for pupils to understand that the line will not continue upward indefinitely, as humans do not keep growing once they reach adulthood. (gentle instrumental music).