&gt; If 90% of your students fail your exam what have you learned?<p>If my freshman year college professors are to be believed, this happens because undergrad is but an entrance exam for postgrad. 300 CS students come into freshman year. Only 30 can make it into postgrad 4 years later.<p>Do the maths.<p>(the stats have improved since the bologna system, now 60 people get into postgrad after 3 years)