Will appreciate if any secondary teachers would suggest some good maths and science books that are most useful to have at home. I only want one copy for each of the subjects or may be two. I know in school teachers probably use a variety of books and materials for teaching. However I feel at least have some good course or work books for reference will be very useful for parents especially at times when dcs want extra support. I find internets are confusing so I always wish I can have some good books as a guide or staring point. Many thanks