SHSAT ENGLISH LANGUAGE ARTS • ELA: REVISING AND EDITING — PART A

Sentences Needing Evidence — Identify which sentence needs more evidence or explanation.

Learn to spot unsupported claims and strengthen any passage by adding the right evidence.

Why Evidence Matters in Writing

Have you ever read something and thought, "Wait, how do they know that?" That feeling is your brain noticing a claim without evidence. Writers have struggled with this problem for thousands of years. From ancient speeches to modern news articles, strong writing has always depended on backing up ideas with proof.

On the SHSAT, you will see passages where one sentence makes a big statement but does not support it. Your job is to find that sentence. Let's look at how the idea of using evidence in writing developed over time.

350 BCE
Aristotle's Rhetoric
The Greek philosopher Aristotle taught that good arguments need logos (logical proof). He said claims without evidence are weak.
1890s
Rise of Journalism Standards
Newspapers began requiring reporters to include facts, quotes, and data to support every major claim in an article.
1960s
Evidence-Based Writing in Schools
American schools started teaching students to write paragraphs with topic sentences supported by specific details and examples.
2010s
Common Core & Standardized Tests
Tests like the SHSAT began asking students to identify sentences that need more evidence, making this skill a key part of exam prep.

Today, being able to spot a sentence that lacks support is not just a test skill. It helps you become a better reader, writer, and thinker. So what exactly does a sentence "needing evidence" look like? That is the question we will answer in this lesson.

Core Principles: Claims, Evidence, and Gaps

Before you can find a sentence that needs evidence, you need to understand three key ideas. A claim is a statement that says something is true. Evidence is the proof that backs up that claim — like facts, numbers, examples, or expert quotes. An evidence gap is what happens when a claim sits alone without any support.

1

Claim

A sentence that states an opinion, a judgment, or a broad fact. Example: "Solar energy is the best option for the future."
2

Evidence

Facts, statistics, examples, or expert quotes that prove a claim is true. Example: "Solar panels now cost 70% less than they did in 2010."
3

Evidence Gap

A claim that has NO supporting detail nearby. The reader is left wondering, "How do you know?" or "Can you prove it?"
4

Explanation

A sentence that tells the reader WHY or HOW something works. Without it, a passage can feel confusing or incomplete.
5

Signal Words

Words like "for example," "studies show," and "according to" signal that evidence is present. Missing signal words can hint at an evidence gap.
KEY TAKEAWAY
Think of a claim like a bridge. Evidence is the pillars that hold the bridge up. If a bridge has no pillars, it will collapse. The same thing happens in writing — a claim without evidence "collapses" because no one has a reason to believe it.

Seeing the Evidence Gap

The diagram below shows how a well-supported paragraph works. Each claim connects down to evidence. When a claim has no evidence below it, you can see the gap right away. That gap is exactly what the SHSAT asks you to find.

The top row shows how claims (purple) should connect to evidence (green). Sentence 5 in red has no evidence below it — that is the evidence gap. The sample passage at the bottom shows how this looks in real writing.

Notice that Sentence 3 uses the word "significantly." Words like significantly, most, best, and always are strong claim words. They almost always need evidence to back them up. Keep an eye out for these when you read a passage on the SHSAT.

How to Find the Sentence That Needs Evidence

On the SHSAT, questions about evidence usually ask something like: "Which sentence would best be supported by adding a specific detail or example?" Here is a step-by-step method you can use every time.

The 4-Step Evidence Check

1

Read the Whole Passage

Do not jump to the question first. Read from start to finish so you understand the topic and main idea.
2

Label Each Sentence

Ask yourself: Is this sentence a CLAIM (it says something is true) or EVIDENCE (it gives facts, numbers, or examples)?
3

Check the Claims

For every claim, look at the sentences around it. Is there at least one piece of evidence nearby? If not, you found a gap.
4

Pick the Weakest Claim

If more than one claim lacks evidence, choose the one that makes the BIGGEST or STRONGEST statement without support.

Let's look at the types of evidence you might expect a writer to include. Knowing what good evidence looks like helps you notice when it is missing.

Common types of evidence found in SHSAT passages
Evidence TypeWhat It Looks LikeExample
StatisticA number, percentage, or measurement"Sales increased by 40% in 2022."
Specific ExampleA real person, place, or event"In Portland, Oregon, a new bike lane reduced accidents on Oak Street."
Expert QuoteWords from a knowledgeable source"Dr. Lin, a marine biologist, stated that coral reefs are shrinking."
ExplanationA sentence that tells HOW or WHY"Because sunlight helps plants make food through photosynthesis, gardens need at least six hours of light."
🔍 KEY TAKEAWAY
Imagine someone says, "This pizza place is the best in town." You would ask, "Why?" If they answer, "Because they use fresh ingredients and won a cooking award," that is evidence. If they just repeat, "It's the best, trust me" — that is an evidence gap. On the SHSAT, look for the sentence that makes you ask "Why?" or "How do you know?" without getting an answer.

Trigger Words and Red Flags

Certain words and phrases are like alarm bells. When you see them in a sentence, stop and check: does the passage give proof? We call these trigger words because they trigger the need for evidence. The diagram below groups these trigger words into categories.

Five categories of trigger words: superlatives, absolutes, judgment words, cause/effect phrases, and broad claims. When you spot these, check for nearby evidence.

Not every sentence with a trigger word is automatically the right answer. Sometimes the evidence appears in the very next sentence. The key is to read the sentences around the claim. If no evidence follows, that sentence needs more support.

💡 SHSAT TIP
If a sentence says "studies show" or "experts agree" but the passage never names the study or the expert, it still counts as needing evidence. Vague references are not the same as real support.

Worked Example: Finding the Unsupported Sentence

Let's walk through a passage just like one you might see on test day. Read it carefully, then follow the four steps.

📝 SAMPLE PASSAGE
(1) Public libraries offer much more than books. (2) Many libraries now provide free Wi-Fi, computer access, and job-search workshops. (3) Libraries are the most important community resource available today. (4) In 2023, the New York Public Library reported that over 30 million people visited its branches. (5) Some libraries also host after-school tutoring programs for students.
Which sentence needs more evidence or explanation?
1
Step 1 — Read the Whole PassageThe passage is about public libraries and the services they offer. The main idea is that libraries do more than lend books.
2
Step 2 — Label Each SentenceSentence 1: CLAIM (says libraries offer more than books). Sentence 2: EVIDENCE (lists specific services). Sentence 3: CLAIM (says libraries are the "most important" resource). Sentence 4: EVIDENCE (gives a statistic — 30 million visitors). Sentence 5: EVIDENCE (gives another specific example — tutoring programs).
3
Step 3 — Check the Claims for SupportSentence 1 is supported by Sentence 2 (which gives examples). Sentence 3 says libraries are the "most important" resource — but no sentence explains WHY they are more important than hospitals, schools, or parks.
Sentence 3 has a trigger word ("most important") and NO evidence nearby to prove it.
4
Step 4 — Confirm the AnswerSentence 4 gives a statistic about visitors, but visitor numbers do not prove that libraries are MORE important than every other resource. Sentence 5 is about tutoring, which is a nice detail but still does not prove the "most important" claim.
Answer: Sentence 3 — It makes the strongest claim in the passage and has no evidence to back it up.

Common Mistakes and How to Avoid Them

Students often lose points on this question type because of a few common traps. The table below shows the most frequent mistakes and how to fix them.

Common mistakes students make on evidence-based SHSAT questions
Common MistakeWhy It's WrongWhat to Do Instead
Choosing a sentence just because it is shortShort sentences can be evidence (like a statistic). Length does not equal weakness.Focus on whether the sentence makes a claim, not on its length.
Picking a sentence that already has evidence nearbyIf the next sentence gives a fact or example, the claim IS supported.Always read the sentence BEFORE and AFTER a claim before deciding.
Confusing a topic sentence with an unsupported claimA topic sentence introduces an idea. It might be general, but the paragraph may support it.Check: does the rest of the paragraph give details about the topic sentence?
Ignoring vague phrases like "many people" or "research shows"These phrases SOUND like evidence but do not name specific sources.Ask: WHO are these people? WHICH research? If no answer, it is an evidence gap.
KEY TAKEAWAY
Think of it like a courtroom. A lawyer cannot just say, "My client is innocent." The judge needs proof — a witness, a video, or a document. On the SHSAT, every strong claim needs its own "proof" in the passage. If the proof is missing, that is your answer.

Connecting to Advanced Writing Skills

Finding sentences that need evidence is a skill you will use long after the SHSAT. In high school, you will write research papers where every argument must be backed by sources. In college, professors call this evidence-based reasoning. The table below shows how this SHSAT skill connects to what comes next.

How this SHSAT skill grows with you
SHSAT Skill (Now)High School Skill (Next)College / Career Skill (Later)
Identify which sentence needs evidenceAdd citations and quotes to support your own claims in essaysEvaluate sources for reliability in research and professional work
Spot vague claims like "experts agree"Learn to use MLA and APA citation formatsDistinguish credible studies from misleading data in news and media
Recognize trigger words (best, always, significantly)Write thesis statements that are arguable and provableBuild persuasive arguments in presentations, proposals, and debates

Mastering this skill now gives you a huge advantage. You will walk into high school English already knowing how to spot weak arguments and strengthen them. That is a skill many students do not develop until much later.

Practice Problems

PROBLEM 1CONCEPTUAL
What is the difference between a claim and evidence? In your own words, explain why a sentence that makes a claim needs evidence.
PROBLEM 2BASIC CALCULATION
Read the following paragraph: (1) School lunches have improved in recent years. (2) Many cafeterias now serve fresh salads and whole-grain options. (3) Healthy eating has an enormous effect on student performance. (4) At Jefferson Middle School, test scores rose by 12% after the lunch program changed. (5) Students also reported feeling more energetic during afternoon classes. Which sentence most needs additional evidence or explanation?
PROBLEM 3INTERMEDIATE
Read the following paragraph: (1) Recycling programs in cities have grown in the past decade. (2) According to the EPA, the national recycling rate reached 32% in 2022. (3) Some cities have introduced single-stream recycling, which allows people to put all recyclable materials in one bin. (4) This approach is clearly the most effective way to increase recycling rates. (5) In San Francisco, the single-stream system helped the city recycle over 80% of its waste. Which sentence most needs additional evidence? Explain your reasoning.
PROBLEM 4APPLIED
Read the following paragraph: (1) Many middle school students participate in after-school sports. (2) Playing sports teaches teamwork and discipline. (3) Research has shown that student athletes tend to have higher GPAs than non-athletes. (4) However, sports programs require significant funding that most schools cannot afford. (5) Some districts have cut programs entirely due to budget issues. A classmate says Sentence 3 needs more evidence because it mentions "research" without naming a specific study. Another classmate says Sentence 4 needs more evidence because it claims "most schools" cannot afford sports. Who is correct, and why?
PROBLEM 5CRITICAL THINKING
Imagine you are editing a classmate's essay. The essay contains this paragraph: (1) Social media has changed the way teenagers communicate. (2) Teens now spend an average of three hours per day on social media platforms. (3) This has led to a dramatic decline in face-to-face conversations among young people. (4) Many teens say they prefer texting over talking in person. (5) Experts believe social media will continue to shape communication for decades to come. Identify which sentence most needs additional evidence. Then write ONE sentence of evidence you could add to the passage to support it.

Lesson Summary

On the SHSAT, you will be asked to find the sentence in a passage that needs more evidence or explanation. Start by reading the whole passage, then label each sentence as a claim or as evidence. Look for trigger words like "best," "always," "significantly," and "most" — these signal strong claims that almost always require proof.

When you find a claim, check the sentences around it. If there is no statistic, specific example, expert quote, or explanation to back it up, you have found the evidence gap. Remember: the bigger the claim, the more evidence it needs. Use the 4-Step Evidence Check on every practice passage until it becomes second nature.

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