DUBOIS (WTAJ) — Clearfield County teacher is retiring after 50 years at the same school.

Donna Chollock is a biology teacher at Dubois Central Catholic.

She started teaching at 21 years old.

Chollock says some students she taught in her classroom, even have grandchildren now.

She tells us now that she’s retiring, she looks forward to having more time to travel, visit family and friends, and continue learning.