I'm feeling a little bad here, though, in that we're all pretty much accusing the OP of exactly what the psych did: cheating to increase the scores.
I guess that, either way, it does answer the question that the OP had about submitting the report as it reads to her dc's school. It is pretty clear that it reads as, "this child was taught the answers before taking the test," and that isn't what anyone in their right mind would want to give to the school.
As to the argument that intelligence is better measured by what one can learn with preparation, it is interesting, but until IQ tests are designed with equal prep opportunities built in for everyone, the reality is that it turns into comparing apples to oranges when one person is pre-taught and another is not.
