6th grade Algebra is very, very high for most students in a gifted program and it doesn’t surprise me they are making the threshold very high. If they have this program in place, they are very aware of what level of achievement is required to be successful. I like the NWEA map test a lot because it allows the student access to higher level testing, doesn’t restrict them, and allows you to see their growth as a progression. MAP does suggest a slightly lower school https://community.nwea.org/docs/DOC-1486 but our school requires around 260 to take 7th grade Algebra. The biggest difference between 2-5 and 6+ is that scores tend to stagnate for a year or two. I think it is a reasonable score.