[ctdonath]

By letting them FAIL.

By making clear that if you have the brain & brawn to work, and you don't produce, your needs WON'T be met by compulsory redistribution of the wealth of those who did.

By telling (and enforcing) students that if they do not achieve the performance standards set then they will not, because they CANNOT, take on more advanced material.

It's tragic that so many students get so far before they experience the message "if you don't do the work you won't pass the course."