Curated Video
Historical Sources
A video entitled “Historical Sources” identifies the differences between primary and secondary sources and discusses how these sources can be used to study the past.
Curated Video
Exploring Carbohydrates
Exploring Carbohydrates identifies the primary functions of carbohydrates by describing how carbohydrates are used as a structural component, for energy storage, and as a source of energy in living organisms.
Sophia Learning
Sophia: Primary vs. Secondary Sources: Lesson 2
This lesson introduces primary and secondary sources. It is 2 of 2 in the series titled "Primary vs. Secondary Sources."