Learn individuals course about social media posts

Do you mean “if you teach”?

If you want to reference specific assets, you can always post a link to that asset. I would suggest that you select free assets so that the students may select those assets without having a subscription. You should, however, state, that free assets are free for a specific moment, and that in the future those assets may not be available for free.

As @Test Screen Name states, you can't share the assets itself, even if they are part of the free collection. Each student needs to take their licence.

Look here for more information on licensing: https://community.adobe.com/t5/stock/links-for-licensing-terms/td-p/11366788
(Disclaimer: As always with licensing, this is my interpretation of the rules. I think they are correct and advice is based on reading and interpreting the licence terms and on fair use for both the buyer and the artist/stock company, but I cannot rule out that my interpretation is wrong. I'm not an Adobe employee).