Common Core LiteracyGrades 11–12History & Social Studies

RH.11-12.2: Central Ideas and a Connected Summary

Also written as CCSS.ELA-LITERACY.RH.11-12.2 · Cluster: Key Ideas and Details.

The Official Wording

Determine the central ideas or information of a primary or secondary source; provide an accurate summary that makes clear the relationships among the key details and ideas.

Common Core State Standards, Grades 11-12, Reading: History & Social Studies · Read it at the source · Checked October 14, 2026

What RH.11-12.2 Means in Plain English

Juniors and seniors pin down what a treaty, diary or history chapter is really about and summarize it so the links between its facts are clear. A summary of Meiji Japan that lists reforms misses the point. One that ties them to ending unequal treaties keeps it.

Ninth and tenth grade (RH.9-10.2) summarized how a source’s key events or ideas unfold from start to finish. Grades 11-12 ask how those details relate: which caused, enabled or explained which. This is the last band of the line, where reading history meets college and career readiness.

RH.11-12.2 I Can Statements

I can state the central idea of a primary or secondary source.
I can summarize a source accurately without adding my own opinions.
I can show how the key details in my summary connect.

RH.11-12.2 Worked Example

The account is written for this page from well-established history; the weak summary gets every fact right and still misses what holds them together.

Read the Story

In 1853, an American squadron under Commodore Matthew Perry steamed into Edo Bay and pressed Japan to open its ports. Within a few years Japan had signed treaties with the United States, Britain and other Western powers, treaties that it could not refuse and did not write.The treaties capped the taxes Japan could charge on foreign goods at low rates, and they let foreigners accused of crimes in Japan be tried in their own consular courts, a privilege called extraterritoriality. To many Japanese leaders they were the mark of a country that was not treated as an equal.In 1868 a coalition led by samurai overthrew the shogun and restored power to the young emperor Meiji. The new government set out to make Japan strong enough to demand equal treatment, under the slogan “rich country, strong army.”From 1871 to 1873, a mission led by Iwakura Tomomi toured Western capitals hoping to revise the treaties. It failed, and its leaders came home convinced that Japan had to build a modern state first. The government pressed on with railways, state-backed factories, an army drafted from all classes and, in 1889, a written constitution.The goal took decades. Britain agreed in 1894 to give up extraterritoriality, and Japan regained full control over its taxes on foreign goods only in 1911.

A short passage written for this page.

Question: What is the central idea of this account, and how would an accurate summary show the relationships among its key details?

Not Yet“Commodore Perry came to Japan in 1853. Japan signed treaties. In 1868 the emperor took power, and the government built railways and factories, drafted an army and wrote a constitution in 1889. Later the treaties were changed.”Every fact is accurate, but the summary is a list held together by and. It never says why the reforms happened or how they connect to the treaties, so it misses the account’s central idea.

Meets the Standard“The account argues that Meiji Japan remade itself in order to win equal treatment from the Western powers. Treaties Japan ‘could not refuse and did not write’ capped its taxes on foreign goods and exempted foreigners from its courts, which leaders saw as the mark of an unequal country. That resentment drove the program of railways, factories, a drafted army and a constitution, and because the Iwakura mission failed to revise the treaties by asking, its leaders decided that strength had to come first. The payoff was slow: Britain gave up extraterritoriality in 1894, and Japan regained control of its taxes on foreign goods in 1911.”It leads with the central idea, then links each detail to it with because-and-so logic: the treaties create the resentment, the resentment explains the reforms, the failed mission explains the order, and the dates show the result.

Question Stems to Use

What is this source mostly arguing or explaining, in one sentence?Which detail explains why the other details happened?Where would the words because, so or in order to belong in your summary?What did you leave out, and does the summary still hold together without it?Does your summary add any opinion the source does not state?

Common Mistakes with RH.11-12.2

A summary that is only a list

“Perry came, treaties were signed, the emperor took power, Japan built railways.”

Try this: Have students join every pair of sentences in their summary with a relationship word, such as because, so or in order to.

Naming the topic instead of the idea

“The central idea is the Meiji Restoration.”

Try this: Ask what the source says about its topic, and require the central idea to be a full sentence a reader could disagree with.

Slipping opinion into the summary

“Japan wisely copied the West and became a great power.”

Try this: Underline every judgment word in the summary, then check whether the source makes that judgment or the student added it.

Where RH.11-12.2 Fits

Comes BeforeRH.9-10.2Summarize how the key events or ideas of a history source develop over its course.

AlongsideRI.11-12.2Determine two or more central ideas of an informational text and analyze how they interact.WHST.11-12.2Write explanations of historical events that make the links among causes, details and results clear.

Comes NextRH.11-12.3Weigh competing explanations of an event against the evidence in the sources.RH.11-12.9Integrate several sources into one coherent account of an event, noting discrepancies.

Practice RH.11-12.2

Quick Check

Which two terms of the treaties did Japanese leaders resent?
Low caps on the taxes Japan could charge on foreign goods, and extraterritoriality, which let accused foreigners be tried in their own consular courts.
What did the failure of the Iwakura mission teach its leaders, according to the account?
That Japan had to build a modern state before the Western powers would agree to revise the treaties.
When did Japan reach its goal, and why does that matter for a summary?
Britain gave up extraterritoriality in 1894 and Japan regained control of its taxes on foreign goods in 1911, which shows the reforms served a goal that took decades.

RH.11-12.2: Other Names

RH.11-12.2CCSS.ELA-LITERACY.RH.11-12.2