The Fact Finders series is a non-fiction component of Oxford's popular infant reading scheme, Oxford Reading Tree. The Fact Finders introduce non-fiction books to infant children, and focus on developing the information retrieval and handling skills they need to use them effectively. The series encompasses a whole range of genres, illustration styles and subject focuses. The units progress in difficulty from Unit A through to Unit F. The accompanying teacher's guides offer teaching strategies and photocopiable activities. Unit F, 'Our Environment', supports National Curriculum Geography, History, Science, Technology, and Mathematics, as well as developing reading skills and demonstrating different styles of non-fiction writing.