As you are aware, your GCSE is comprised of the following:  Unit 1 - a portfolio on science in the workplace. This unit is worth 20%.  Unit 2 - exam on forensic science, food science and sports science. This unit is worth 40%.  Unit 3 - an extended portfolio on one of the topics from unit 2. This unit is worth 40%. If you'd like to have a look at the specification and the markscheme, you can download it from AQA's site (http://www.aqa.org.uk/qual/appliedgcse/new_add_sci.php). Download the 2009 adobe file.