iCivics, a free online, civics education program created by Supreme Court Justice Sandra Day O'Connor, is aligned to state and national standards to teach core civics content. The research question for this study is: Does spending at least 30 minutes on the iCivics interactive web site 2 times per week improve student scores on a civics test? A pretest and posttest was given to 253 students in Grades 4, 5, 6, 8, and 12 after spending at least 30 minutes per week for 6 weeks on the iCivics interactive web site. Questions are aligned with the U.S. citizenship test (U.S. Department of Homeland Security, U.S. Citizenship and Immigration Services, Office of Citizenship, 2011) and Texas Essential Knowledge and Skills (Texas Education Agency, 2011b, 2011c). Fourth-grade students showed statistically significantly higher gains than did all other grades, indicating an interaction between mean test scores and grade level. Test scores for the sample as a whole statistically significantly improved from pretest to posttest focused on improving content-specific science instruction for students in the elementary classroom. (Contains 4 figures and 3 tables.)