Учителя́ not учи́теля. Учи́теля is genetive not plural
Nice, concise answer. Have a lingot!
May it be учителья the genitive form?
Why is it "учителя" but not "учители"?
The irregular plural form.
Wiktionary says учи́тели is dated... This noun is actually becoming irregular? Leveling to compare with some other word(s)?
Yes, the plural is "учителя́". The similar words are: то́поль (poplar), ла́герь (camp), я́корь (anchor). For most other words ending in -ль/-рь, forming the plural with "-ля́" is considered highly colloquial.
very very good to know, thank you so much!!
It's becoming frustrating to learn without explanation.. why is it "наши учителя" when simply "teachers" is "учителей"?
учителей is the genitive plural
Is учителя the genitive form of учителей? Is genitive form required after the possessive pronouns?
This question has already been answered: it's the irregular plural form. It's nominative and no, the possessive pronouns are declined according to the case of the noun. :)