South Dakota ELA 9-10.RH.2.a

ELAGrades 9–10Reading: History/Social Studies

The Standard

Analyze how ideas develop over the course of the text.

South Dakota English Language Arts Standards (2025)

Teacher's field guide

What Students Need to Do: Students track a main idea through a history or social studies text. They explain what each new example, fact, or point of view adds to it.
What Mastery Looks Like: A student can point to passages near the beginning, middle, and end that build the same idea. They can explain how later details make the idea clearer or more complex, rather than just listing those details.
Common Misconceptions: Students may name a topic, such as voting rights, instead of the writer's idea about it. They may also treat each example as a separate idea or assume that added evidence means the writer changed their mind.
How to Assess It: Give students a one-page excerpt from the class history textbook. Ask them to underline where a main idea first appears, circle a later detail that adds to it, and explain the link in one sentence.

Lesson moves

Cut a short textbook passage into paragraph strips; pairs put them in order and label what each paragraph adds to the main idea.
After reading an account of the New Deal, ask: “What does the final paragraph add to the opening idea about federal aid?”
Give pairs three quoted sentences from a history reading; have them sort the sentences into introduces, adds evidence, and complicates, then defend their choices.
Give students a local news story about a proposed bus route; have them mark its opening idea and two later details that sharpen or complicate it.

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A ready-to-print activity worksheet aligned to 9-10.RH.2.a, with an answer key for the teacher on its own page. No account needed.

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