Analyze How
Ideas Are Developed
Learn to trace how authors introduce, illustrate, and elaborate key individuals, events, and ideas in informational texts.
What Does "Develop an Idea" Mean?
When authors write informational texts, they don't just state an idea and move on. They develop it: they build it up layer by layer so readers truly understand it. Think of it like constructing a building: first comes the foundation, then the walls, then the details.
The Three Key Moves Authors Make
Why Does This Skill Matter?
The I-I-E Framework
Use this three-part framework every time you analyze how an idea is developed in a text. Ask yourself these questions as you read:
Illustrate vs. Elaborate
Students often confuse these two moves. Here is how to tell them apart:
| Illustrate | Elaborate | |
|---|---|---|
| Purpose | Show the idea | Explain the idea |
| Methods | Examples, anecdotes, facts, descriptions | Analysis, reasons, connections, implications |
| Key Question | "What does this look like?" | "Why does this matter?" |
| Signal Words | for example, such as, one instance | this means, as a result, therefore |
How to Apply the I-I-E Framework
Worked Example: The Great Fire of London
Breaking Down the Fire Example
Worked Example: Marie Curie
Notice how the author doesn't just say Curie was important. The passage introduces her as "pioneering," illustrates with the discovery of two elements and two Nobel Prizes, then elaborates by connecting her work to cancer treatments and nuclear energy.
Harder Example: Coral Reef Decline
Mapping the Coral Reef Passage
Ways Authors Illustrate Ideas
Ways Authors Elaborate on Ideas
Common Mistakes to Avoid
Summary: I-I-E at a Glance
| Stage | What to Look For | Signal Words |
|---|---|---|
| Introduce | First mention of person, event, or idea; framing language | is known as, refers to, one of the most |
| Illustrate | Examples, anecdotes, facts, vivid descriptions | for example, such as, in one case, specifically |
| Elaborate | Analysis, significance, cause/effect, connections | as a result, this means, therefore, consequently |
Question 1 of 5
"The Amazon rainforest is the largest tropical forest on Earth. It spans nine countries and contains roughly 10% of all species on the planet. Jaguars, river dolphins, and thousands of bird species call it home. Scientists warn that deforestation is shrinking the forest at an alarming rate, threatening not only wildlife but also the global climate, since the Amazon absorbs billions of tons of carbon dioxide each year."
Which sentence best represents the elaboration stage of idea development in this passage?
Question 2 of 5
An author writes: "Honeybees are essential pollinators. For instance, they pollinate about one-third of the food we eat." The second sentence is an example of which I-I-E stage?
Question 3 of 5
What is the main difference between illustrating an idea and elaborating on it?
Question 4 of 5
"Rosa Parks is often remembered as the woman who refused to give up her bus seat. On December 1, 1955, in Montgomery, Alabama, Parks was sitting in the front of the 'colored' section when a white man demanded her seat. She quietly refused. Her arrest sparked the Montgomery Bus Boycott, a 381-day protest that became one of the most important events in the civil rights movement, ultimately leading to the Supreme Court ruling that bus segregation was unconstitutional."
How does the author introduce Rosa Parks in this passage?
Question 5 of 5
A student says: "The author uses the example of the bakery fire to introduce the idea." What mistake is this student making?