Our chapter has a study tables system that has worked pretty well. Our chapter GPA has risen since implementing it!
Everyone who has above "Pi" or 3.14 is a proctor and they proctor one hour a week in our dining room. The proctors usually do their homework during this time and make sure that those studying in the dining room are actually studying and not just talking or reading magazines.
If you have below a 3.14 then you are put on a certain number of proctored study hours that correspond to your GPA. It starts with 2 hours and goes all the way to 10 hours if you are as low as a 2.0! These hours must be signed off by the proctor for that time slot or if there isn't a proctor scheduled for that time slot then they are signed off by an Exec member. This makes sure that you are actually studying and it's not just your roommate saying um...sure you kinda studied.
By having the proctor system it ensures that everyone is doing at least one hour of structured study time a week. If you miss a week you are given one week to make up the hours but if that doesn't happen you are sent to our Angel Support Board (standards board) for more stringent consequences. I personally like the system, staying off of study tables is enough to keep my GPA up!
Jess