The document presents research on the relationship between student attendance and academic performance. It finds that students with higher absenteeism, defined as missing 18 or more days of school, performed at lower levels on standardized tests than students who missed 7 or fewer days. Specifically, higher percentages of chronically absent students scored at the novice level in science and social studies assessments compared to their regularly attending peers. The author concludes that attendance impacts student achievement and that the school needs to implement strategies to improve attendance in order to help more students succeed academically.