Assignment sheet and sample mark scheme for a research project on the effects of smoking tobacco on the respiratory system. Students are asked to conduct research into chemicals found in tobacco smoke and the effects of three specified chemicals. They are then given the freedom to choose how they present their research, with the guideline that it should be structured as an informational advertisement (suggestions for possible formats are given). Originally designed to support the KS3 Exploring Science program, this project would fit into any National Curriculum specification. It could also work in a PSHE or other health education program. Includes the assignment sheet in PDF, Word and Pages format, and a PDF of the mark scheme I use, formatted 2-up on a page for ease of copying.