I've requested to have my daughter re-tested for the CogAT in the fall because they tested her without giving us a chance to prepare. There are books for it but I wonder if there are other options available.
If you feel that the test is an underestimation of your dd's ability, I'd be more inclined to have her retested on an actual IQ test than retested on a group test. Would the school take outside test scores, can you afford to do IQ testing, and/or would the school be willing to administer a true IQ test (they'd need a licensed person such as a psychologist to do so)?