Re: Teaching the names of techniques.
Three techniques I used to learn our vocabulary:
Ask if you don't know. In our dojo after the instructor demonstrates the technique and makes any points they are trying to make they ask if there are any questions...perfect opportunity.
Make flashcards. Don't make them too complicated for example we have a technique called "munetski ushiro kata hiki otoshi". As a beginner I would look at that and my mind would freeze. When I made my flash cards I put each word on its own card. That way I wasn't just trying to learn the technique name but what each word in the name meant.
When something is demonstrated name it in your mind. Expect to be wrong a lot in the beginning but the practice of trying to associate what you see with the words you know is very valuable.