Curated OER
Earth Science Lesson Plans The Proterozoic Era
Middle schoolers explore the Proterozoic Era. For this geologic time periods lesson, students examine the clock of eras charts and listen to a lecture regarding the era.
University of California
Ucmp: The Paleozoic Era
An excellent overview of the Paleozoic Era. It also provides a chart where you can learn information regarding each of the time frames within the era.
Encyclopedia of Earth
Encyclopedia of Earth: Proterozoic
Article describing the Proterozoic Eon, which lasted from 2.5 billion to 543 million years ago. It covers the subdivisions of the Proterozoic Eon, geology, Earth's atmosphere at the time, climate, and life forms. (Published: July 26, 2010)
University of California
University of California Museum of Paleontology: Geology and Geologic Time
This site provides information about the geologic relationships of rock layers, as well as much about geologic time and the history of Earth.
Center for Educational Technologies
Earth Floor: Geologic Time
This is a nice explanation of geologic time and Earth's major eras. Although this site is designed for younger students, it is mostly text with few images.
Sophia Learning
Sophia: Proterozoic Age: Lesson 3
This lesson illustrates the proterozoic age of the history of the earth. It is 3 of 3 in the series titled "Proterozoic Age."