Reignite student interest in word study! These Irregular Plural Noun activities and games can transform your word study block into a highly anticipated time of day for students in the Syllables and Affixes stage! With the Connect 6 board game and Match it Up card game activity, you'll be sure to increase student engagement and personal teaching joy during word study, spelling, or word work. These spelling games printable activities focus on helping students learn that sometimes plurals are formed in unusual ways, not by simply adding -s or -es. They learn that often when words end in f, they must change the f to a v before adding -es in words like leaves, wolves, and knives. They also learn that in some words there is a vowel change to signify its plural form in words like feet, mice, and teeth. Aligned to Words Their Way Spelling Lists for Syllables and Affixes Spellers Sort 8.