Windows 7: Having issues with sharing permissions

Okay 3 desktops same configs one laptop, all on 7 pro! Gonna be connecting them through a router, then the laptop wirelessly! The three desktops all have an account named student, i can create one on the laptop if needed. Need to give certain read only, read write, no access, to different computers on a folder on each computer, when looking i could not figure out how to find the other computers in the advanced sharing? Should i see the other computers in the location section once everythings connected like in the screenshot?

And once i get them all there will i be able to give them the different permissions?

Sorry if this sounds dumb but man i had problems trying to figure it out today first bad router settings, then got the router working, and just couldnt figure it out! So i come here for some pointers before i give it another shot Thursday!

Thanks!

In order for those other Users to show up on the "Share With" list you need to add those Users on your own machine as a standard user account, otherwise they will not show up so you can set up those special shares for each User.

User Account - Create

What about in this case where each computer has the exact same user? they are all named student

You need to have different names for each user on the LAN, otherwise you will have no way to tell them apart in order to set up separate permissions.