I haven't read all the replies but we went back and forth about testing my 6 year old. He was in a half-day K program this year and it was not working well. We ultimately decided to have him tested to tease out some other difficulties (ADHD like behaviors, sensory processing difficulties). We used an evaluator recommended on the Hoagies' Gifted Ed page-- someone with years of experience working with gifted learners. We are so happy that we decided to test because what we thought we knew about him was not entirely correct. Example: he is a voracious reader and prolific writer. We naturally assumed he was more of a verbal/auditory-sequential learner. Well, he blew the top off of all the PRI subtests, and he's three grades ahead in MATH when we haven't done any math instruction at home (and, really, in K they don't do much in school). We also knew he was gifted but we didn't know he'd be profoundly gifted- and that also helped put the ADHD like stuff and the SPD stuff into context. Moreover, it helped us to go with our gut and homeschool from here on out. Good luck with whatever path you choose.