This is a set of 6 science lessons for the winter course from the end of December 2024. It includes the textbook and answer key. The material covers important units, and the explanations are easy to understand and comprehensive. * There is writing in the book, but many pages are unused. Please check the photos for examples of the writing. * This item was used by a child, so please purchase it if you are not concerned about minor imperfections. * The name will be erased with a correction pen before shipping. * Returns are not accepted as the material can be copied.