- https://www.ego4u.com/en/cram-up/grammar/adjectives-adverbs/adjectives/exercises
- http://www.englishexercises.org/makeagame/viewgame.asp?id=5373
- http://www.agendaweb.org/grammar/comparative-superlative-exercises.html
- http://anthonyhalderman.com/english/compsup.htm
- http://www.myenglishpages.com/site_php_files/grammar-exercise-grammar-comparatives-superlatives.php
- http://www.englishexercises.org/makeagame/viewgame.asp?id=7493
- http://www.englishexercises.org/makeagame/viewgame.asp?id=6009
- http://www.englishexercises.org/makeagame/viewgame.asp?id=1833
- http://www.englishexercises.org/makeagame/viewgame.asp?id=2065
- http://www.englishexercises.org/makeagame/viewgame.asp?id=5425
- http://www.englishexercises.org/makeagame/viewgame.asp?id=6088
- http://eslpuzzles.com/Grammar%20Games/Adjective%20Games/Adjective%20Grammar%20Games.html
- http://eslpuzzles.com/Grammar%20Games/Adjective%20Games/Comparatives%20Game%20Pirate.html
- http://www.eslgamesplus.com/comparatives-superlatives-wild-zoo-animals-vocabulary-grammar-interactive-monkey-fun-activity/
- https://www.gamestolearnenglish.com/compare/
- http://www.marks-english-school.com/games/basketball.html
- https://www.eslgamesplus.com/comparativessuperlatives-esl-grammar-nature-world-geography-vocabulary-fun-game/