This is the 17287th most frequent Polish word.
zaliczają
"Zaliczają" means "they pass" or "they complete" (in the context of accomplishing something, such as a test or task).
In this sentence, 'zaliczają' refers to successfully completing or passing a required academic task.
Studenci zaliczają egzamin końcowy w maju.
Students pass the final exam in May.
Here, 'zaliczają' implies finishing or moving through successive parts of an activity.
Uczniowie zaliczają kolejne etapy wycieczki.
The students complete the subsequent stages of the trip.
In this context, 'zaliczają' means achieving or reaching a milestone in a physical activity.