This is the 636th most frequent Polish word.
otrzymali
"Received."
The word 'otrzymali' means 'received' here, referring to the action of getting something (an invitation).
Oni otrzymali zaproszenie na przyjęcie.
They received an invitation to the party.
In this instance, 'otrzymali' conveys that the students earned or were awarded their high grades due to their effort.
Dzięki ciężkiej pracy, uczniowie otrzymali wysokie oceny.
Thanks to hard work, the students received high grades.
Here, 'otrzymali' indicates that the parents got or were given a letter, emphasizing the act of receiving the letter from the teacher.