This was designed as an introductory lesson to radioactivity to a low ability group and covers the first lesson in the AQA P7 Radioactivity topic. Students are taken back to the structure of the atom to ensure that they are confident about the terminology of subatomic particles before moving on to look at the three types of radioactive decay. As a practical is not always possible depending on the policy about radioactive sources in schools, I found a virtual lab online, (link in the presentation), which allows you to either demonstrate to the whole class or to allow students to carry out investigations on their own. Tables of results are provided. Example data has been put into the tables on the slides to allow discussion. A conclusion is then written about the practical with students having to complete the core question and one other. Students are then given a choice of differentiated questions to complete the lesson. There are some extra slides at the end to help in discussion.