Is it Islamically permissible to complete university studies despite their negative impact on work in terms of lateness, fatigue, and absence, and what is the ruling on the money earned if the management overlooks deducting from the salary due to this absence and lateness?

It is a Muslim's right to raise their academic level, improve their material and moral conditions, and they are asked to always strive for progress, as Umar ibn Abd al-Aziz said. We advise you to seek Allah's help and master your work as a teacher. There is no harm in dedicating yourself to study if the administration permits it, and the money you earn is lawful, by Allah's will.