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Oil canvas depiction of the USS Constitution engaged in at sea combat with the HMS Guerriere. The USS Constitution's white sails have impact holes while the HMS Guerriere has heavy damage to the mast and sails.
Review

Naval History and Heritage Command

Among the archive's digital collections users can find oral histories, biographies, underwater archeology resources, and infographics.
Thumbnail image of a meeting of the League of Nations. It shows three men sitting at the head of the table with other four men and a woman standing behind them.
Review

The League of Nations Archive

The archive offers an extensive array of primary sources that can be used in the study of global history, international relations, transnational conflict, national border creation, migration, human rights, and historical personages.
Olympic Museum Logo
Review

Olympic Museum

The modern Olympic Games have become a symbol of international cooperation and sportsmanship. The IOC states that the Olympics are a forum “where the world comes to compete, feel inspired, and be together."
Nobel Peace Prize Medal
Review

Nobel Peace Center

However, most notable is their partnership with Minecraft Education. The Peace Center offers two Minecraft learning landscapes, Peace Builders and Active Citizen, both are targeted at students aged 8-15.
Soviet Astronaut holding the red hammer and sickle for Soviet propaganda
Review

A Visual Guide to the Cold War

The goal of the site is to facilitate discussion around key themes of the Cold War and provide insight into both American and Soviet perspectives.
The logo of the website which reads "Visualizing Energy: Data Stories to Guide an Equitable Energy Transition." The background is of a blue sky with windmills. Below there is a tab for featured data stories.
Review

Visualizing Energy:

By combining written analysis with data visualizations, this project displays how energy policy can affect health and equity in a way that makes it interactive and easy to understand.
The edge of a counter with a man's shoulder and lettering in detail.
Source

Early Modern Counter

An early modern counter of the "Reichenmaster" style, with one side showing a picture of a man using a counting board and the other side showing the alphabet. These counters were used in classrooms to teach students both to read and perform basic arithmetic.

A green background with counters on a counting board and pen and paper math.
Source

Division with an Early Modern Counting Board

Before the rise of literacy rates, counting boards such as the one featured in the video were the most common way to perform arithmetic. After pen-and-paper arithmetic replaced counting boards, Arabic numerals also became dominant throughout Europe. 

A green background with counters on a counter board.
Source

Multiplication with an Early Modern Counting Board

Before the rise of literacy rates, counting boards such as the one featured in the video were the most common way to perform arithmetic. After pen-and-paper arithmetic replaced counting boards, Arabic numerals also became dominant throughout Europe. 

A man sits in front of a counting board with a pile of counters in front of him and a counter in one hand.
Source

Engraving of a Rechentisch (Counting Board)

This image of an engraving depicts a man using a rechentisch, or counting board, the earliest known counting device and a precursor the abacus. The earliest known counting board is the Salamis Tablet, dating from 300 BCE, but may have been used more for gaming than for calculating.