Can't sync the deck I've created with my student's deck

Greetings. So I’ve started using Anki in teaching. I’ve created a deck for one of my students and sent them the APKG file. It works for them just fine, but my initial idea was to update the deck after every class so that they could get new vocabulary cards a couple of times per week. How do I do that withought having to create a new deck all the time? I’ve created a new set of cards that work fine for my own anki account, but my student’s deck has remained unchanged. How do I fix that?

You can export a new .apkg, and the student will get new items you’ve added when they import it. Anki doesn’t have a feature to automatically sync changes to other users, but I believe there are third-party add-ons that offer such functionality.