A Real challenge....

do any of you Excel gods know how to set up a macro that would allow me to input specific users (students in this case) access to use a lab spreadsheet. Where would I input their specific student numbers to give them access?

I would like a prompt, for when a student goes to open a particular lab (one that they would be prompted to specify (eg lab #3), they would have to enter their student id. I believe this can only be done using a macro, however I am a newbie so please do forgive if there is any other way.

Also, after being granted permission, I would like them to only be able to enter data in specific cells once, and to enter values in sequence. If the data they enter is not within a specific range, I would like to have a prompt show up which would read something like "Value is Outside the Range, Please logout" and have the spreadsheet 'lock' so that they would not be able to input another answer. If the value they enter is within the range, they would input the next value until they either complete the inputs, or input an incorrect answer.

They would then logout and log back in to another lab, and their work would be saved in a specific folder of which only I could access (how would I set that up as well?)

Eg. Student opens up excel file
-they are prompted to enter their student number
-they are prompted to enter which lab # they wish to work on
-they are brought in to the spreadsheet which matches the lab they've requested.
-they would only be allowed to enter data in each lab once (so refusal of trying to login to a lab they have already worked on)

Is this at all possible, or am I way over my head.

Any help/suggestions would be greatly appreciated.

I have attached a sample spreadsheet in case anyone is brave enough, and clever enough to figure this out.

Thanks in advance,

MBS