The Environmental Studies Co-ordinator covered pollution by involving the Year 4 pupils in a STEM experiment.  Three cards covered in Vaseline were placed around the school - one in the classroom and two outside and left untouched for 4 days.  A card was was also attached to the back of a car.  Samples were taken from the Vaseline and put under a microscope to compare the different levels of pollution and to highlight the extent that car travel has on our air quality.