Need Appointment Scheduling Help

I'm a teacher that is trying to work out an efficient way to schedule appointments. I need to set up appointments with 75 students (in three different classes) over a three week period

All the programs I find seem to cost money or have limitations that make them unworkable.

Perhaps I'm not looking in the right places?

If you have a suggestion for me please help!

 

Did you try Google Calendar? Or you could any of these online apps - http://www.allthingsweb2.com/mtree/SCHEDULE_2.0/

 

Thanks for the suggestions. I went ahead and used a Wiki and that seems to be working fine.

 

Do you mind demonstrating how you used a wiki for scheduling? Im curious to know.