Use picture books to introduce preschoolers to adjectives. Go to the public library or children's section of a bookstore to select age-appropriate books that describe adjectives along with a visual representation of the adjectives. Examples of books about adjectives for preschoolers include "If You Were an Adjective" by Michael Dahl and Sara Gray or "A Is for Angry: An Animal and Adjective Alphabet" by Sandra Boynton. Share the books with preschoolers during story time. Write the adjectives on the chalkboard or white board as you read the story.
Provide preschoolers with a blank piece of paper and assign each preschooler an item to draw such as a car or a dog. Provide art supplies and ask the preschoolers to decorate their photo. At the bottom of the page, write the phrase "My car is" or "My dog is". Encourage the students to think of a few adjectives to describe their drawing. Write the adjectives beneath the drawing. Share the drawings and the descriptions with the class.
Use flashcards to play a game that helps children learn to sort adjectives into similar groups. Create two sets of flashcards using poster board and markers. Make one set of flashcards with a splotch of color on and the name of the color beneath the splotch. Create a second set of flashcards with illustrations of sizes such as big and small, short and thin. Write the adjectives beneath the illustrations. Encourage children to sort the flashcards into two piles: colors and sizes.
Bring a variety of silly hats into the classroom. Some examples of hats include a sombrero, a Mardi Gras hat, a chef's hat, a tiny leprechaun's hat and a raccoon cap. Place the hats on your head one at a time. Ask the preschoolers to use words that describe the hat. Write the descriptive words on a chalk board or white board. Ask the children to avoid using the same words twice. Help the preschoolers with synonyms if they struggle to find new words.