Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
Elementary is regular. It follows the -ies Conversion rule.
Use plural verbs: "The elementaries are ready" (not "is ready").
Yes. The plural elementaries is standard across all English variants.
The word elementary follows the standard English pluralization rule. When forming the plural, elementary becomes elementaries. This follows the -ies Conversion pattern, which is one of the most common plural rules in English.
Understanding why elementary becomes elementaries helps with spelling and pronunciation. Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
When using elementaries in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The elementaries are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.