I'll generate a complete, self-contained HTML slide deck for "Identify Main Idea" following the design system exactly. ```html Identify Main Idea — HSPT Reading
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Identify the
Main Idea

Learn to find the central point a passage is built around and tell it apart from the details that support it.

HSPT Reading

What Is a Main Idea?

The main idea is the single most important point an author wants you to take away from a passage. Everything else in the text exists to support, explain, or prove this one central point.

Three Key Terms

Topic
What the passage is about, in one or two words (e.g. "honeybees").
Main Idea
The author's key point about the topic, in a full sentence.
Details
Facts, examples, and reasons that back up the main idea.

A Passage Is Layered

MAIN IDEA the central point SUPPORTING DETAILS facts • examples • reasons statistics • quotes • descriptions Details hold up the main idea — like a foundation

Why It Matters

Main idea questions are among the most common on the HSPT Reading section. Spotting the central point quickly helps you:

1
Answer faster. You won't get lost re-reading every detail.
2
Avoid traps. Wrong answers are often true details that miss the big picture.
3
Understand structure. Knowing the main point makes all other questions easier.

The Main Idea Rule

Think of it as a test of "fit." A correct main idea fits the passage like a perfectly sized box: it holds every detail with no empty space and nothing spilling out.

Not Too Broad, Not Too Narrow

passage Too Broad covers far more than the text just right Main Idea ✓ fits the passage exactly passage detail Too Narrow covers just one small detail

Main Idea vs. Detail

Main Idea Detail
Scope Covers whole passage Covers one point
Role What is proven Proof or evidence
How often Appears throughout Appears once
Question test "What is this about?" "What does line 4 say?"

A Four-Step Approach

1
Find the topic. Ask: "What is this passage about?" in a few words.
2
Check the first and last sentences. Main ideas often live there.
3
Ask what the details prove. The point they all support is the main idea.
4
Test for fit. Reject answers that are too broad, too narrow, or off-topic.

Worked Example 1

Topic: sea otters. The details — kelp wrapping, rafts, rocks — are all clever survival habits. The last sentence states it directly.

Worked Example 2

Too narrow
"Bats eat insects." Only one detail.
Just right ✓
"Bats are misunderstood but useful animals."
Too broad
"All animals help farmers." Not in the text.

Worked Example 3

No single sentence states the point until the end. Ask what the details prove: cheaper books, more readers, faster ideas all show one big change.

Common Mistakes

✕ Picking a true detail
A fact from the text that's correct but covers only part of the passage.
✕ Going too broad
Choosing a sweeping statement the passage never actually supports.
✕ Adding outside info
Picking what you know is true in real life, not what the passage says.

Quick Summary

Step Ask Yourself Watch Out For
Topic What is this about? Going too vague
Key sentences First & last say it? Trusting the middle alone
Details What do they prove? Picking just one detail
Fit test Does it cover it all? Too broad or too narrow

Question 1 of 5

Which best describes the main idea of a passage?

Question 2 of 5

What is the main idea of the passage?

Question 3 of 5

An answer choice that is true but only covers one sentence of the passage is most likely:

Question 4 of 5

Which choice is too broad to be the main idea?

Question 5 of 5

When no single sentence states the main idea directly, the best strategy is to:

You've Got the Main Idea

``` I've created a complete 20-slide deck for **"Identify Main Idea"** following the design system exactly. Key features: - **Title slide** with a clean minimal book/lines icon and the "HSPT Reading" subject pill only - **Concept slides** (2–4): definition, three key terms (Topic/Main Idea/Details), and a layered pyramid diagram - **Core rule + Goldilocks diagram** showing "too broad / just right / too narrow" - **Key distinction** comparison table (Main Idea vs. Detail) - **Four-step approach** numbered list - **Three worked examples** of increasing difficulty (explicit → narrow/broad analysis → implied) - **Common mistakes** grid with red accents - **Summary table** and an encouraging closing slide - **5 MCQ assessment slides** — two with collapsible passages, all with single-attempt feedback that prepends "✓ Correct!" Everything uses the exact CSS template, semantic HTML, accordion behavior, keyboard/touch navigation, ARIA labels, and grade-appropriate reading content. KaTeX is loaded per spec (no math was needed in this reading lesson, but the renderer is in place).