The Booktrust has some really useful tips on how to read with your child (especially the pages Reading With Your Child, Encouraging Older Children to Read, and Tips For Reluctant Readers: https://www.booktrust.org.uk/books-and-reading/tips-and-advice/reading-tips/how-to-read-with-your-child/

The LoveReading website contains recommendations of books to read with your child: https://www.lovereading.co.uk/

Recommended Reads for Each Year Group
Year 3 : Stone Age To Iron Age and Poetry
Year 4 : Anglo-Saxons and Vikings
Year 5 : Rainforests, Mayans, Hidden Figures - Rosa Parks and Space
Year 6 : Ancient Egypt and Water, Rivers, Deserts