[total]

I'd be highly interested in knowing how exactly it goes about showing these metrics:

* By class: The defense would probably be that it helps the teacher get a better understanding of the class and how to change tactics.

* Per student: The defense here would probably be that it helps the teacher target a particular student for the purpose of individualizing the support they provide.

The 'per student' method is far more open to abuse in that it would also allow the teacher to pick out students that didn't match what they believed to be 'appropriate' studying. Both opens are open to abuse, though, as a 'by class' metric would show them that some students study in a way that does not align with the teacher's belief(s); they might have their opinions about some students slacking off or what have you and decide that they are the ones pulling down the stats and single them out as a result.

Either way, this amount of surveillance opens up the door for a good deal of abuse and there should be a good amount of discussion regarding it before it is thrust upon unknowing student.