One of the greatest scientific feats of our era is the astonishing progress made in understanding the intricate machinery of life. This intensive, 72-lecture course gives you the background and guidance to explore in depth the fundamental principles of how living things work—principles such as evolution by natural selection, the cellular structure of organisms, the DNA theory of inheritance, and other key ideas that help you appreciate the marvelous diversity and complexity of life.

The feudal relationships during the Middle Ages established a hierarchy that deeply affected the social landscape of the period. In Social Structure in the Middle Ages, students will explore the complex relationships between a lord, his vassals and their serfs -- an intertwining of the wealthy and poor that ensured everyone in these medieval societies depended on each other. Discover the importance of land during this time and how ownership of estates affected nearly every aspect of life.

 

Junior Grades (4-6), Intermediate Grades (7-8) (JI)

 

Note: The pocket spy: Will your smartphone rat you out? Was our oldest ancestor a proton-powered rock? Solving the crystal maze: The secrets of structure. Six diseases you never knew you could catch

Intonation - the rise and fall of pitch in our voices - plays a crucial role in how we express meaning. This accessible introduction shows students how to recognize and reproduce the intonation patterns of English, providing clear explanations of what they mean and how they are used. It looks in particular at three key functions of intonation - to express our attitude, to structure our messages to one another, and to focus attention on particular parts of what we are saying.

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Bestselling author Bernard Cornwell takes us back four thousand years, to a vibrant world of ritual and sacrifice that is at once timeless and wholly original. This historical novel unlocks the mystery of Britain's most haunting and puzzling structure, and tells a tale of three brothers—fierce rivals—who are uneasily united in their quest to create a temple to their gods.