The fourth book in Apologia’s hands-on, interactive homeschool math curriculum , Exploring Creation with Mathematics, Level 4, student text was designed to encourage your child to dive into a joyous journey of discovering new things about the world and their Creator. As they explore math on a deeper level, students will learn more about symmetrical patterns that open their eyes to the beauty, order, and truth of Creation. Apologia product: https://www.apologia.com/shop/mathematics-level-4-student-text-and-workbook/