JenSMP -
Most Achievement tests don't help with school placement. They are more about comparing kids to other kids in various areas than helping teachers know what to do with kids. The MAP is an exception, and I would certianly suggest that the guidance counselor try and set that up.
I know the 3rd-6th graders take the Iowa Basic Skills Test each year. Would something like that work? If MAP testing is the way to go, how does the counselor gain access to this testing if it's not something that's typically done?
If it's Math - try Aleks.com's free asessment.
Maybe it's just me, but I can't seem to find the free assessment on the site.