Students may interact with a computer and take a subject-verb agreement quiz. One of the best things about this type of interaction is that it is immediate. In other words, the computer will tell the student when they are right and wrong and on which of the questions. The web has a series of free online quizzes for older students, and an example may be found on City.edu.
There are numerous websites that offer free subject-verb agreement games in which a cartoon character such as a bee asks questions and students use the mouse to point and click on what they believe is the correct answer. BBC Skillswise (at bbc.co.uk) has subject-verb agreement games that offer three different levels of challenge.
Older grade school students may enjoy the more challenging and visually appropriate online games, such as "Spaced Out Subject Verb Agreement" (at gotkidsgames.com). This game actually times the students and has an outer space theme that should hold students' attention. Having a contest among students to see who can get the best time on the game could pique their interest and even incorporate other students as they watch the competition.
Using index cards, write out sentences with a missing verb, one sentence per card. On another set, write verb choices such as "is," "are," "have," "has," "were" and "was," for one verb choice per card. Color the back side of the cards with a consistent color for verb and subject so they are easy to sort, and then add a sticker on the back of each one so there is something students can use to recall when they see the correct verb or subject to aid in creating a subject-verb agreement. Each student gets to draw two cards: one subject and one verb choice. They should flip up the cards and see if they created a correct agreement between the subject and verb. If so, the student gets to keep the cards. If not, he must flip the cards back face down in the same spot and it is the next student's turn. For each agreement, a student earns points. The student with the highest number of agreements wins the game.