My brother sent this headline from an Ottawa daily newspaper last week:
This headline contains an error in subject-verb agreement. In any sentence, the number of a verb has to match the number of its subject.
To determine the correct form of the verb, we would ask ourselves, "what is/are becoming more creative?"
The answer is "cheating," which is singular. For correct subject-verb agreement, the sentence should read, "Cheating at Ottawa schools is becoming more creative each day," since "is becoming" is the singular form of the verb.
If we re-worded the sentence slightly, and "cheaters" became the subject of the verb "becoming," it would be a different story (and likely, a more accurate statement, since cheating can't really be creative -- only cheaters can). In that case, we would say "Cheaters at Ottawa schools are becoming more creative each day." The plural subject ("cheaters") would call for a plural verb ("are becoming").
Thanks for the tip, Chris!