In grade 8 (the only grade in which subgroup trends were analyzed by achievement level), Missouri showed across-the-board gains--improvements in both reading and math at the basic, proficient and advanced levels for all racial/ethnic subgroups, low income students, and boys and girls. Results on achievement gaps were mixed. Comparable data were available from 2006 through 2009 for grades 4 and 8 in reading and math. In 2008-09, Missouri changed its high school testing program to end of course exams, and therefore trend data were unavailable at that grade level. (Contains 9 tables.) [For the main report, "State Test Score Trends through 2008-09, Part 2: Slow and Uneven Progress in Narrowing Gaps", see ED513914. For the 2009 Missouri report, see ED507965.]