New Oxford Modern Science For class 6, schools have a choice to use a combined book for physics, chemistry, and biology or separate books for each of these subjects. For classes 7 and 8, separate books are available for physics, chemistry, and biology. A conscious attempt has been made throughout the series to present scientific concepts in a student-friendly manner. In addition the series encourage students to participate actively in the process of learning, and also develops in them a variety of skills, such as observation and classification.