The "what level is appropriate" question is one that NO single snapshot like a CoGAT can answer.
Furthermore, a lot of testing that produces grade levels as results-- is age-normed.
What that means is that "5" means that this is the 50th percentile (that is, the center of the distribution) for 5th graders TAKING the same instrument (which would presumably be well below level for most of them).
I mention that because while a 7yo that scores as "11th grade" in a reading test is certainly out of the ordinary, it in NO way means that they are ready for reading instruction to regularly be at 11th grade level. It probably DOES mean that instruction with other more typically developing 7yo's is likely to be frustrating and not meeting the child's needs well, however.
The only way to know what IS appropriate is to trial a few things that are harder until she begins to experience genuine challenges.
