.icon-didattica { width:60px; height:60px; background: #fff url(icons/teachers/didattica.png) top left no-repeat; cursor:pointer; }
.icon-registro-classe { width:60px; height:60px; background: #fff url(icons/teachers/registro_classe.png) top left no-repeat; cursor:pointer; }
.icon-registro-voti { width:60px; height:60px; background: #fff url(icons/teachers/registro_voti.png) top left no-repeat; cursor:pointer; }