This set includes two sets of plural words (25 each), so there is a total of 50 singular/plural words! The sets can be used separately or be used all together. There are two sorting pages where students sort plural words according to the rule they follow. In addition, there are two practice worksheets and two crossword puzzles. There are word cards for all of the words - singular and plural. Students may cut the words apart and use them in a center to play Concentration or to review 'sorting according to rules.' A fun activity in a center is to have one student read the singular word and have a friend spell the plural word. These worksheets and word cards are a great way for students to see plural words and to learn reading and spelling them! If you like this, there are more vocabulary and grammar resources available at my store - Terri's Teachables.