(bright music) <v ->In this Year 5 lesson from the unit</v> "Properties, changes, and separating materials" pupils develop their substantive knowledge by learning that a filter is a device used to remove unwanted substances such as solid particles from a liquid. Prior to this, pupils learned that some solids do not dissolve in a liquid, which makes them insoluble. They understand that a sieve is a type of filter used to separate larger solids from liquid when they have not dissolved. In this lesson, the teacher guides the pupils in developing their understanding of filtering. They learn that scientists use a special type of paper with tiny holes in it as a filter. <v ->You make it into a taco,</v> then you make it into a triangle. Then you make it into a little party hat. You put it in the funnel. <v ->And you're gonna put it in a beaker. </v> <v ->You're gonna put it in a beaker. </v> <v ->And you stir it. </v> You wanna pour it in the middle. <v ->It's becoming clear water. </v> <v ->This video shows pupils as active participants,</v> working scientifically and purposefully to use scientific apparatus and follow procedures. They explore using filter paper with a funnel to separate insoluble solids from liquids. In doing so, they develop their disciplinary knowledge of using a range of scientific equipment. <v ->I think it's scraping all of the sand off of the water,</v> so it's making it clear. The sand is insoluble because it doesn't dissolve in the water, so you might not want to drink it. <v ->Now that pupils have learned</v> how to use filter paper correctly, they should apply this technique to separate a broader range of solids from liquids and choose an appropriate method for recording their results. To deepen their understanding of science in practical contexts, pupils should explore how filters are used to remove insoluble solids from liquids in everyday life. (bright music fades out).