What are the plural forms of the words medium and curriculum?

They are media (the Latin plural) and mediums.

The other is media, the actual Latin plural of this Latin Word. The appropriate form is largely determined in context. When talking about the distribution of news or of information in general, the Word media is almost always used. It would be very awkward to refer to 'news mediums' for example.

- For the person (a medium) or something of medium size, the plural is mediums.

- For a substance, agency, or communications form, the plural is media, and the singular may not be appropriate for some uses.