This is the 4795th most frequent Spanish word.
corregir
To correct or rectify.
Here, 'corregir' is used to denote reviewing and marking student work.
El profesor corrige los exámenes de sus estudiantes.
The teacher corrects the exams of his students.
This sentence uses 'corregir' in the sense of physically improving or adjusting something.
Debes corregir tu postura al sentarte.
You should adjust your posture when sitting.
In this sentence, 'corregir' means to fix or rectify mistakes generally.