Talking about skills level, which adjective fits better: "intermediate" or "medium"?

I thought "intermediate" was the appropriate label for the second of a three-level system of grading skills level, but I just saw a CV template on which the levels are defined as "basic", "medium", and "advanced". This made me wonder which one is more appropriate.

Solution 1:

Intermediate is used for skill level.

he is taking a class in intermediate ballroom dance.

Medium is used for measurements like clothes size or temperature.

set your microwave at high, not medium, to warm up your soup.

the shirt is medium size for an adult but extra large for a teenager.

Solution 2:

For those of us who teach EFL/ESL, the three terms are generally Beginner, Intermediate, and Advanced. However, Basic, Intermediate, and Fluent are equally acceptable. Medium is no good, IMHO, except when talking about how you like the yolk in your fried egg cooked: over medium, or how you like your steak broiled: medium (rare) = pink, not bloody dark red.

Fluent comes in two flavors, however. Some people are workplace fluent (they can read and write as well as speak and understand fluent professional job-related English) and others are practically native-speaker fluent (they can speak, understand, read, and write as well as any educated native speaker and understand cultural references as well as relatively arcane idioms).