This paper profiles Colorado's test score trends through 2008-09. Between 2005 and 2009, the percentages of students reaching the proficient level on the state test and the basic level on NAEP (National Assessment of Educational Progress) increased in grades 4 and 8 in both reading and math. Average annual gains were generally larger on NAEP than on the state test. In grade 8 math, average annual gains on the state and NAEP tests were the same. Trends in average (mean) test scores generally moved in the same direction (up) as trends in percentages proficient/basic except in grade 8 reading, where average scores on the state test declined. (Contains 1 footnote.) [For the main report, "State Test Score Trends through 2008-09, Part 1: Rising Scores on State Tests and NAEP", see ED513962.]