Curated OER
Why Do Ice Cubes Melt?
First graders investigate water properties by participating in a hands on experiment. In this ice formation lesson plan, 1st graders examine real ice cubes in a bowl and identify the reasons why certain cubes melt faster than others....
Curated OER
Pleistocene Mammals
Young scholars research the causes of the extinction of Pleistocene mammals. In this Pleistocene mammals lesson, students read essays to understand the Pleistocene epoch. Young scholars write an essay about the personal impact of...
Curated OER
Precession
Learners explain how Hipparchus, around 130 BC, used a shift in the predicted location of a lunar eclipse to detect a slight shift in the path of the Sun around the sky. They examine the elliptical orbit in which the Earth travels around...