Missing just one day of school has negative consequences for a student’s academic achievement, the first major study linking poor attendance to lower NAPLAN results has found. And school attendance patterns established as early as year 1 can predict how often a student will show up to class right through high school, according to the research.

http://www.smh.com.au/nsw/skipping-school-for-just-one-day-affects-naplan-results-study-finds-20140802-zzjmr.html