Final answer:
The sentence is incorrect due to a subject-verb agreement error; it should be "All of them go to school," with a plural verb 'go' to match the plural subject 'All of them.'
Step-by-step explanation:
The sentence "All of them goes to school." is incorrect due to an issue of subject-verb agreement. The subject of the sentence, "All of them," is plural, and therefore the correct verb form should also be plural. The revised sentence should be "All of them go to school."
When practicing subject-verb agreement, it is vital to ensure that the verb conjugation matches the number of the subject. In cases of collective nouns, the verb form is singular if the group acts as a single unit, and plural if the individuals within the group act separately.
For instance, "The band rehearses every Thursday." uses a singular verb because 'the band' is acting as a single unit.