Students eyes in the class

Students eyes in the class
(-_-) (-_-) (-_-) (-_-) (-_-)
(-_-) (-_-) (-_-)
When teacher say tomorrow will be exam
(O_O) (O_O) (O_O) (O_O)
(O_O) (O_O)
During the exam
(→_→) (←_←) (→_→) (←_←)
(→_→) (←_←)
When invigilator comes in
(↓_↓) (↓_↓) (↓_↓) (↓_↓)
(↓_↓)