Today's lesson focuses on adjectives. The document defines adjectives as words used to describe nouns or pronouns. It explains that there are three forms of adjectives: positive, comparative, and superlative. Positive is the basic form, comparative is used for comparing two things, and superlative is used for comparing three or more things. The document provides rules for changing adjectives to their comparative and superlative forms and includes examples. It then has students practice converting adjectives like "old", "bad", and "good" between their standard, comparative, and superlative forms.