This product is designed to help your fourth graders identify plurals and possessives and identify errors that involve these types of words. There are three sets of 8 questions. The first set asks students to identify whether a word is a plural or possessive and if an apostrophe is needed. The second set gives practice in finding the error (an extra apostrophe or a missing apostrophe). The last set is multiple choice designed to be more like questions found on the STAAR writing test.