This is the 1612th most frequent Russian word.
учителя
"Учителя" - "Teachers" (plural form).
In this sentence, 'учителя' is used as the nominative plural form of 'учитель', referring to teachers in general.
Учителя любят своих учеников.
Teachers love their students.
Here, 'учителя' is the genitive singular form of 'учитель', indicating possession or association.
Мы говорили о проблемах учителя.
We talked about the teacher’s issues.
In this example, 'учителя' is the accusative singular form of 'учитель', used as the direct object of the verb 'listened'.