As you write your family history, include as many primary sources as possible, and document those sources so that others in the future can easily confirm the information that you compiled.

If students need further background on primary and secondary sources, show them the video How to Analyze Primary Sources, which is featured in the online game History Detectives Laboratory.

Food webs illustrate energy flow from primary producers to primary consumers (herbivores), and from primary consumers to secondary consumers (carnivores).

This animated documentary explores the concept of racism in Ancient Greece by examining primary sources and historical context. It distinguishes ancient ethnic prejudices from modern racism ...

Stock shares can be bought in the primary market when a company has an IPO and in the secondary market, once shares start trading after they've been issued.

Primary sources bring history class to mind first, but every day our news feeds are flooded with tweets, political cartoons, interviews, videos, news reports, and more.

New stocks and bonds are sold to investors In primary markets, while securities are traded by investors on the secondary market.

This lesson uses the Mongol invasions of Japan as a case study in historiography. Students develop and apply important historical thinking skills. In particular, they distinguish and examine secondary ...

The Customs and Border Protection report says the Trump administration built 52 miles of new primary wall systems and 33 miles of new secondary wall systems where there were none before.

Graham and Blumenthal introduced The Sanctioning Russia Act of 2025, which looks to impose primary and secondary sanctions against Russia if it does not agree to long-lasting peace with Ukraine.