A would never recommend a school doing testing... A school isn't going to guarantee that the place will be quiet and that the test can be done with out some phone ringing or someone dropping in, any of those things can easily happen and easily throw a kids' concentration.
Second problem is suppose your child has a bad day, isn't feeling well or whatever... if that happens the day they are taking the test you just put a low score in the child's permanent record and with no child left behind policies their is no guarantee that it wont be available to every teacher the child has until they graduate. It will also be a problem if you later test him by a private place and he tests gifted... now the school has a gifted score and a non-gifted score... which will they use? Some might use the higher score, others that already have as many kids in the gifted program that they want will see the low score as a good way to keep him/her out.
If you do the private testing you control the test results not the government funded school.
