This year the Center on Education Policy (CEP) analyzed data on the achievement of different groups of students in two distinct ways. First, it looked at grade 4 test results to determine whether the performance of various groups improved at three achievement levels--basic and above, proficient and above, and advanced. Second, it looked at gaps between these groups at the proficient level across three grades (grade 4, grade 8 in most cases, and a high school grade). These two types of analyses show whether elementary school achievement has generally gone up for different groups of students and whether achievement gaps at different grade levels have narrowed, widened, or stayed the same. This paper profiles the student subgroup achievement and gap trends in Iowa. Achievement trends were mostly upward in Iowa, at least at the proficient achievement level. Gains were shown at the proficient level for all subgroups, but there were declines at the advanced level in reading. Achievement gaps have narrowed almost across the board. (Contains 9 tables.) [For the main report, "State Test Score Trends through 2007-08, Part 3: Are Achievement Gaps Closing and Is Achievement Rising for All?", see ED507909.]