What would be the full percentile score for DS10 end of the year 4th grade RIT 247 in Math? 99.?

See p. 155: MAP norms charts

Yep, 99th percentile for end of 4th, between 97th and 98th for end of 5th, 94th for end of 6th... In other words, really high.

Thanks st pauli! So proud of DS - he's been doing EPGY math grades 5-6 for the past 2 weeks and he's half way through the 5th grade material. And he just got into the School Within a School for 5th grade, so he should be able to accelerate as needed. After reading about the struggle so many parents are having with appropriate school placement, I'm very grateful to have that program. If he didn't get in to SWAS, I was seriously thinking about homeschooling (tho he will soon pass me up in math :)). I didn't really appreciate the appeal of HS, but now I get it!