That's really good score.

Most people do not know SCAT. But if you explain this is from JHU and the test is 2 grades above level testing, it's easier to understand. You may send info with the link, references, etc...
Here's one. http://cty.jhu.edu/talent/docs/Webinar%20Presentions/2015AfterTestingWebinar.pdf

I advocated with my DD's SCAT result. The administration agreed and tried to help but they simply did not have resources and we ended up moving to a different school district.

The other test EXPLORE and new PSAT is well known and you won't need explaining to do. But for 2nd and 3rd graders (most states), SCAT is the only available test.