If you travel during peak hours you have to pay full fare just like anyone else. There are no reduced fares for students.

Good afternoon D. Nadzhymi and welcome to the NS Community.

If you're making a return trip every day from Monday to Friday, your best options are most likely the NS Flex Traject Vrij susbcription, or an NS Flex Dal Vrij subscription if you're travelling mostly during the off peak hours. However, if you want a more detailed advice, we would need to know the route and the times that you're travelling on.