Teacher here, need a little help with login

[FuturistMOD]

I am having a small problem with the way the login info is showing up on one of my new iMacs. Im sure it was one of the students that messed around with something. Here is a picture of what it the initial screen is supposed to look like:

http://s12.postimage.org/zdamcv3tp/0911020824.jpg

And here is what the initial screen looks like now:

http://s9.postimage.org/bgq697gof/0911020823.jpg

Any ideas?

 

[trsblader]

Go to settings and select users & groups. On the left you'll see "Login Options". Click that and look for "Display login window as:" and select "Name and password".

 

[quasinormal]

Using your admin account have a look in;

System Preferences > users and groups (10.8) or Accounts (pre 10.8) > Login Options

You should see an option for a user name and password (pic 1) or list of users (pic 2). If the padlock in the bottom left hand corner is locked, you'll need to enter the admin password to make changes. Don't forget to click the padlock again to lock it.