This is the NWEA guidance on level selection:
https://www.nwea.org/content/uploads/2017/08/MAP-Growth-Administration-Guidance-25AUG17.pdf

See also this discussion on test selection, with more nuanced recommendations from NWEA specifically regarding gifted students:
https://community.nwea.org/docs/DOC-2842

...pronounced like the long vowel and first letter of the alphabet...