Should allow upload file in the same page or a new page?

I am building a web site where students have to do their homework online.

I have a page that shows a list of cards , every card represent a homework. On every homework the students have to upload files.

I am thinking on two options :

1) Display a list of cards whith a short description and when the user click it , open a new page showing the full homework description,some details and allow the student upload their file.

2) Display a list of cards whith a short description and when the user click it , expand the card showing the the full homework description, some details and allow the student upload their file.

The homework description could be very large on some cases.

English isn’t my first language, so please excuse any mistakes