This general achievement trends profile includes information that the Center on Education Policy (CEP) and the Human Resources Research Organization (HumRRO) obtained from states from fall 2008 through April 2009. Included herein are: (1) Bullet points summarizing key findings about achievement trends in that state at three performance levels--basic and above, proficient and above, and advanced; (2) Background information about limitations of the state's test data and characteristics of the state's testing system, including major changes in its testing system; (3) Figures and tables with the percentages of students scoring at the proficient level and above for all years with comparable data since 1999 and for all grades tested under the No Child Left Behind Act; (4) Figures and tables with percentages of students performing at three achievement levels--basic, proficient, and advanced--for all years with comparable data and for grades 4, 8, and 10 (or adjacent grades, in the case of states that lack comparable trend data for these default grades); (5) Figures and tables with mean scale scores, standard deviations, and effect sizes for all years with comparable data and for the three grades analyzed in this study; and (6) Figures and tables with mean scale scores, standard deviations, and effect sizes for all years with comparable data and for the three grades analyzed in this study. In general, West Virginia students made gains at the basic, proficient, and advanced achievement levels. However, there were some declines at the high school grade analyzed. Specific results include: (1) Between 2004 and 2008, the percentage of students reaching the basic level and above in reading increased slightly at the elementary and middle school levels but declined slightly at the high school level; in math, the percentage of students at the basic level and above rose slightly at the elementary and middle school levels but fell slightly at the high school level; (2) In reading, the percentage of students at the proficient level and above increased at a moderate-to-large rate at the elementary grade analyzed, went up slightly at the middle school level, and went down slightly at the high school level; there was a moderate-to-large gain in the percentage proficient in math at all three grade levels analyzed; and (3) The percentage of students reaching the advanced level in reading increased slightly at the elementary and middle grades analyzed and decreased slightly at the high school level; in math, there were moderate-to-large gains in the percentages of advanced students at the elementary and middle grades analyzed and a slight gain at the high school level. (Contains 6 figures and 6 tables.) [For "State Test Score Trends through 2007-08, Part I: Is the Emphasis on 'Proficiency' Shortchanging Higher- and Lower-Achieving Students?," see ED506121. For "State Test Score Trends through 2007-08. Part II: Is There a Plateau Effect in Test Scores?," see ED506122.]