Start by explaining to the children what an adjective is. It is a “describing word,” which could relate to a person, place or thing. For example, in the sentence, “The red car was parked outside the school,” the adjective would be the word “red.”
Ask the children to think of as many adjectives as possible. The above example should lead them to come up with different colors, but you may need to encourage them to think of words like "big," "small," "hairy" and "smelly."
To help the children spot adjectives, explain that they are usually a color, size or number. They could also relate to how something feels, smells or sounds. This will help the children identify adjectives if they are struggling.
To further help the children understand what adjectives are, ask them to point out the adjectives as you read a book together. Books aimed at second grade children will tend to have short, basic sentences that will not be too challenging. As you read aloud, ask the children to point out the words they think are adjectives and then praise them if they are correct. This is also great reading practice for the child.
Once the children have a firm grasp of what an adjective is and can spot them with confidence, ask them to try to use adjectives in a sentence. Again, the sentences do not need to be very long. For example, they can use a sentence as simple as "The giant cat took a nap." Ask the child to underline the adjective they have used to make sure that they fully grasp the concept.