Script needed

hi all, i new to scripts. I need assistance with a script that will delete the contents inside the folders, not the folders. For eg. c:\users\studentnumbers. Inside the c drive i have a folder called “users” and inside the “users” i have many student number folders. And obviously inside each student number folder they have saved alot of their previous tests and exams. I want a script that will only delete the contents of each of those student number folders, but keep the main student number folder. Please assist!!!