Give students a paper with a chart composed of three columns. The first column is for the base word. The second column is for the superlative form of the word and the third column is for the superlative form of the word. Fill the first column with words and have the students fill in the second and third columns for each word, or place words randomly in different columns so the students must fill in the first, second or third column. Some words change endings in comparative and superlative form. For example, happy changes from -y to -i to form happier and happiest.
Use pictures and sentences to encourage students to fill in the correct comparative and superlative. For example, one problem could show a picture of an elephant next to a picture of a mouse, and the sentence would say "An elephant is (blank) than a mouse." Use the pictures to help underscore the idea that -er words are used for comparing two things, while -est words are used to compare three or more things.
Make a word search puzzle for the students to find comparatives, superlatives, and root words. The list of words to be found can be at the top of the page, and as the students cross each word off of the list, they can place the word in the correct column at the bottom of the page under the headings adjective, comparative and superlative. Use random adjectives, or make a theme search and add a fourth column for words that follow the theme, such as kinds of animals.
Involve the students in the activity, finding superlatives around the classroom. Use a tape measure or have students stand back to back and have the class tell which student is taller and which student is shorter. Ask students to find the tallest and shortest people in the class. Ask which student has darker or lighter hair and which student has the lightest or darkest hair. Find objects in the room to compare. Ask students to find which picture is higher on the wall and which is lower. Ask them to point out who has a larger desk and who has a smaller desk.