During peak times you may experience serious lagging in the game.
It could be your computer, your server, or Kingsisle servers.
I correct this lagging one of 3 ways; a) Resetting my modem(I have ATT U-VERSE) b) Selecting to quit game that goes back to your classroom with other wizards to choose from, then returning to the game. c) Select a different realm like Satyr with less people.