When the teacher mispronounced the word, a few students sniggered from the back of the classroom.

The sniggerer at the back of the conference made several people uneasy with his quiet, derisive laughs.

The sniggerers at the back of the classroom made it hard for the nervous student to concentrate.

A snigger escaped from the back of the classroom when the teacher mispronounced the student's name.

A few students snigger at the mispronunciation, trying not to draw attention.

Whenever the teacher turns away, he sniggers at his classmates' mistakes.

He felt self-conscious as classmates were sniggering behind his back.

The sniggering from the back of the classroom made the boy hide his face.

Despite the teacher's warning, the sniggerings from the back of the classroom made it hard for her to concentrate.