I am curious as to whether you stock enough product to be able to supply very large orders, such as for a school with multiple classes, or an institution, not just individual artists

Ordering online is still the better option. Blick is big enough, but you'll be hard pressed to find them having sufficient depth for a school on hand. That's just not how detail works these days.

You can always order what you need online as well if they don't stock what you need in the amount that you need. It's really a great store

Yes they have plenty of stuff for at least a few classes from what I've seen