Hi Ametrine,
I'm not familiar with particular testers in Oregon, but here's a link to Hoagies:
Hoagies List of Psychologists Familiar with Gifted Do you already know what school your kiddo will be attending? Sometimes the schools will test for you, for free.
I would check. I have found that schools are much more willing to accept the tests they are familiar with.
As for what kinds of tests, what we did was have our son tested with a pychologist familiar with GT kids, and she happened to use the SB-V, so that's what we used. We did an IQ test first, then saw what we were dealing with and approached the school, who then agreed to do achievement testing of their own.
Are you thinking of possibly skipping kindy? Or just looking for a good fit school good with differentiation? If he's working so far ahead in every level, a regular kindergarten won't likely be a good fit, unless you have a particular goal in mind that regular kindys are good at (like "learn how to do school" and "learn how to write").
If you're looking to skip kindy, what sort of laws are there in your state for this? Or are there requirements specific to your district? If so, those laws/rules/etc. might give you more guidance on what sort of testing you should have your DS take.
Good luck.
