Vocabulary

I've been racking my brain to come up with a good way to teach vocabulary to my gifted students.  My district uses this old video series called Wordsmith which teaches wordcells.  I want my students to recognize prefixes, suffixes, and root words since this is what they are tested on.

How do I make the vocabulary relevant to them?  They didn't remember most of what last year's teacher taught.  If you have any ideas, I would love to hear about them!