Our Year 8 are completing their Biology syllabus by looking at sampling.
Her you can see them using Quadrats to find Populations of Organisms (fairly immobile ones).
Here they are collecting data to find the Population of Plantains in a 100m2 area.
Their first task was to take a minimum of 10 quadrats (10% of the total area) and count the number of Plantains in their quadrat, they had to decide how to place the quadrats randomly and penultimately; they had some good old-fashioned mathematics to get an estimate of the Plantain Population. After this, they compared their answers and evaluated the whole procedure.