he made his teachers smile

This student showed his teachers an old photo of them and asked for their autograph on it.

And when the first teacher saw it, she felt really shy.

And when he went to the second teacher, she started laughing and even covered her face without signing it.

And when he went to the third teacher, she was shocked with her mouth open, not knowing how he got that.

But when he went to the last teacher, she happily signed it because it was her favorite picture from her childhood.