Why Does This Skill Matter?
Every day you read things that try to convince you of something. A poster in the school hallway might say, "We should recycle more." A book about animals might say, "Dogs are smarter than cats." A news article might say, "Eating fruits and vegetables helps you stay healthy." But how do you know if what you read is really true? That is where reasons and evidence come in!
People have been thinking about this for a very long time. Let's look at a short timeline of how humans learned to tell the difference between good arguments and bad ones.
So here is the big question this lesson answers: When you read an informational text, how can you figure out what the author's point is, and how can you tell if the reasons and evidence the author gives actually support that point?
Key Ideas You Need to Know
Before we dive into examples, let's learn four important words you will use all through this lesson. Think of them as your "reading detective toolkit."
Point (or Claim)
Reason
Evidence
Support
See How It All Fits Together
The diagram below shows how an author builds a strong argument. Notice how the point is at the top, like a roof. The reasons hold it up like pillars. And the evidence supports each reason from underneath.
When you read an informational text, try to picture this diagram in your mind. Ask yourself: What is the author's point? What reasons does the author give? And what evidence backs up each reason?
How to Find Reasons and Evidence When You Read
Finding reasons and evidence is like being a detective. You have a set of steps to follow. Here is a simple process you can use every time you read an informational text.
Let's break down each step. Step 1: Find the Point. Read the passage and ask yourself, "What is the author trying to convince me of?" The point is often in the first or last paragraph. It might start with words like "I believe," "We should," or "The most important thing is…"
Step 2: Ask "Why?" Once you know the point, ask yourself, "Why does the author think this?" The answers to "why?" are the reasons. Look for words like "because," "since," "first," "also," and "another reason."
Step 3: Ask "How do you know?" For each reason, ask, "How does the author prove this is true?" The answers are the evidence. Evidence can be facts, numbers, expert quotes, or examples. Look for phrases like "studies show," "for example," "according to," and "research found."
Now let's look at a second diagram that shows you the kinds of signal words to watch for.
Keep these signal words in mind when you read. They are like little flags waving at you saying, "Hey! A reason or a piece of evidence is right here!" The more you look for them, the easier it gets.
Different Types of Evidence
Not all evidence looks the same. Authors use many kinds of evidence to make their reasons stronger. Knowing the different types helps you figure out if the author's argument is really convincing. Here is a handy chart.
| Type of Evidence | What It Looks Like | Example |
|---|---|---|
| Facts | True statements that can be checked | "The earth takes 365 days to go around the sun." |
| Statistics (Numbers) | Numbers, percentages, or data | "8 out of 10 dentists recommend brushing twice a day." |
| Examples | Specific stories or cases | "In Ms. Garcia's class, students who read 20 minutes a day improved their grades." |
| Expert Opinions | What a knowledgeable person says | "Dr. Smith, a sleep scientist, says kids need 10 hours of sleep." |
| Comparisons | Showing how two things are alike or different | "Schools with art programs have fewer absences than schools without them." |
Strong informational texts usually include more than one type of evidence. If an author only says "I think so" without any facts, numbers, or examples, the argument is not very strong. When you write about an author's evidence in your own work, be sure to point out which type of evidence the author used. This shows that you are reading carefully and thinking deeply.
Worked Example: Reading Like a Detective
Let's practice with a real passage. Read the paragraph below carefully, and then follow the steps to find the author's point, reasons, and evidence.
See how that works? By following the steps, you can break any passage into its parts and explain how the author builds an argument. Now it's your turn!
Strong Evidence vs. Weak Evidence
Not all evidence is equal. Some evidence is strong and really helps the author's point. Other evidence is weak and doesn't do a great job of proving anything. Here is how you can tell the difference.
| Strong Evidence | Weak Evidence |
|---|---|
| Comes from experts, scientists, or trusted sources | Just says "everyone knows" or "people say" |
| Includes specific numbers or data | Uses vague words like "a lot" or "many" |
| Gives real examples you can check | Only shares the author's personal opinion without proof |
| Connects directly to the reason it supports | Talks about something off-topic or unrelated |
| Uses more than one piece of evidence per reason | Only gives one weak piece of evidence for the whole passage |
When you write about an informational text, you can talk about whether the author's evidence is strong or weak. You might say something like: "The author supports this reason with a study from scientists, which is strong evidence." Or you might say: "The author only says 'everyone knows this,' which is not strong evidence because there are no facts to back it up."
Taking This Skill Even Further
Right now, you are learning to find reasons and evidence and explain how they support an author's point. That is already a really big deal! But as you grow as a reader and writer, you will use this skill in even more exciting ways.
| What You're Learning Now | What Comes Next (5th Grade & Beyond) |
|---|---|
| Find the author's point | Compare two authors' points on the same topic |
| Identify reasons and evidence | Judge which author makes a stronger argument and explain why |
| Explain how evidence supports a point | Find evidence that does NOT support the point (flaws in reasoning) |
| Recognize types of evidence | Tell the difference between fact, opinion, and bias |
In 5th grade, you will learn to compare what different authors say about the same topic and figure out who makes a better case. You will also start spotting tricks that some writers use to make weak arguments sound strong. But it all starts with what you are learning right now — finding the point, the reasons, and the evidence. If you can do that, you are ready for anything!
Practice Problems
Try these problems on your own. Read each question carefully, think about your answer, and then click "Show Answer" to check your work. You've got this!
Putting It All Together
In this lesson, you learned how to read informational texts like a detective. Every informational text has an author who is trying to make a point — a main idea they want you to believe. To make that point convincing, the author gives reasons that explain why the point makes sense. Each reason is backed up by evidence, which can include facts, statistics, examples, or expert opinions. When you read, look for signal words like "because," "for example," "according to," and "studies show" to help you find the reasons and evidence.
You also learned that not all evidence is equal. Strong evidence comes from trusted sources, uses specific numbers, and connects directly to the reason it supports. Weak evidence is vague, uses words like "everyone knows," or only shares personal opinions without proof. When you write about an informational text, you should explain what the author's point is, what reasons and evidence the author gives, and how well the evidence supports the point. This skill will help you become a smarter reader, a stronger writer, and a better thinker — not just in 4th grade, but for the rest of your life!