Students who skip lessons ought to do poorly because they simply don't get taught. But as the chart below - based on PISA scores for Singapore students - shows, students who answered "1 or 2 times" to "in the last two full weeks of school, how many times did you skip some classes?" appear to do as well as students who attended every single lesson. It seems that some moderate class skipping, perhaps combined with self-study, might not necessarily be a bad thing.
|Source: PISA 2012|