“The Thinking Tree – 10 Subject Portfolio: 1 Year Plan” is an illustrated textbook designed for non-formal education of students aged 9-13. Authored by Sarah Brown and published by CreateSpace in 2016, this trade paperback study guide contains 448 pages of educational content focused on various subjects. With a visually engaging layout and written in English, this book provides a comprehensive plan for learning over the course of a year, making it an essential resource for elementary school students looking to enhance their educational experience. The large size of 11 x 8.5 inches makes it easy to read and navigate, while the inclusion of illustrations adds an interactive element to the content.