How To Change System Attribute For All Folders Using Command Prompt

I work at a school as Computer Applications Technology teacher.The students bring homework to school on their flashdrives, and though we have good antivirus software at school, the viruses on their home PC's will often do considerable damage to the data on their flashdrives.One of the most common problems we have is some virus that sets the "system" attribute on all folders, effectively hiding them, and then creating shortcuts named after those folders, inviting people to double-click them, thereby effectively installing the virus locally (though our antivirus blocks it). So the problem is that those folders (with their homework) can only be revealed by going into "Folder Options" and selecting "Show hidden files and folders" and removing the option to "Hide protected operating system files". This is a big breach in security.So I usually have to change those settings, run the Attrib command in the command line to change all the folders, and then re-enable the settings.All of this takes up valuable time.What I would like to know is, is there a way to give the attrib command once, thereby changing the attributes on all folders on a specific flashdrive? I played around with the /S /D and *.* settings, but couldn't accomplish anything.