attendance with finger print

Hi,

I am planning to create a school attendance system. I searched the web but couldn't find an example project about it. First I want to enroll students finger prints to a server and then to record lesson attendance by taking their finger prints before they attend a lesson.

I'm also planning to create a system for early leave for students. Can arduino send finger prints to a server and get response if the student is allowed to leave and unlock tripot turnstile allowing to pass?

Thanks

How many students in each class? How many students in the school? Do you know how much data is needed to store a fingerprint? How is your Arduino going to communicate with the server (wired or wirelessly)? What's to stop a student from having his/her fingerprint taken and then not attending the class?