Harvard University
Harvard Smithsonian Center for Astrophysics: Time and the Calendar
This lesson helps learners discover the importance of time and the calendar, and how they each bring order to life. Each activity is designed for students understand the passage of time, how to keep time, international time zones,...
Harvard University
Harvard Smithsonian: Everyday Classroom Tools
The focus of this series of lessons is to engage students in an exploration of the world around them. The emphasis is on inquiry as students learn about the earth, sun, light, shapes and more.