Table 7.

Failure rates across quarters

	Low structure	Moderate structure			High structure
	Spring 2002	Spring 2003	Spring 2005	Autumn 2005	Autumn 2007	Autumn 2009
Percentage of students < 1.5	18.2	15.8	10.9	11.7	7.4	6.3
n	324	333	330	333	336	653