We examined how much agreement there was between scores from large-scale mandated assessments and report-card grades for 14,776 students in grades 3, 6, and 9 of a district in which conditions were conducive to alignment of assessments. We found significant mean differences between internal and external assessments: effect sizes were 0.29 to 0.63 in grades 3-6 and 0.10 to 0.30 in grade 9. Spearman correlations were in the 0.32-0.59 range. Chance-adjusted agreement was low. Report-card grades were consistently higher than external assessments for grades 3 and 6 students and consistently lower for grade 9 students.