One way to work on adjective use is to unscramble sentences. Begin with a base sentence with each word on a separate card. Give the cards to students and have them arrange themselves in a sentence at the front of the class.
The boy chased the puppy around the table.
Next, give adjectives to students and have them join the sentence in the proper place. Note that English grammar places adjectives before the nouns they modify, but in Spanish, adjectives follow the nouns they describe, so provide practice for English learners with this activity.