Every time you read something, there is one big point the writer really wants you to know. That one big point is called the main idea. It is like the roof of a house, because everything else in the text works to hold it up.

The small pieces of information that hold up the main idea are called the details. Details can be facts, examples, or little bits of information that give you more to think about. Each detail is like a wall or a beam that keeps the roof from falling down.

Here is a trick to find the main idea: ask yourself what the text is mostly about. Not one tiny part, but the whole thing. If a paragraph tells you that dogs can smell, hear, and guard, then the main idea is that dogs are helpful, and the smelling and hearing are the details.

Sometimes the main idea is written right in the text, often in the first or last sentence. Other times the writer hides it, and you have to add up the details yourself to figure it out. Both ways are fine, because you are being a reading detective.

Knowing the main idea helps you in real life too. When you tell a friend about a movie, you do not say every single thing that happened. You give the big point and a few good details, and that is the same skill you use when you read.

So when you read, look for the roof and the walls. The main idea is the roof, and the details are the walls holding it up. Find both of them, and you really understand what you read.