What are some good resources for practicing pull offs and vibratos? Thanks.
The times they are a changin'.....
Just practice really.

Take three/four notes, and practice pulling off between them.
Remember not to just lift your finger off the fretboard, but flick it sideways.

Also, practice trilling, which is hammering on/pulling off between two notes really fast

Vibrato, same applies, pick a note and practice vibratoing it.

They're aren't really difficult techniques, a little bit of practice and you'll have them down.
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It's can be a contraction and genitive case.

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If you cut down on these costs students won't learn so well, effecting the "quality"...
Also when you pull off make sure you're not bending at the same time.