1.   He skipped chemistry class three times last month.

2.   I was hopelessly out of my depth in college chemistry classes.

3.   Ever get busted in chemistry class for reading a comic book instead of your textbook?

4.   He told the story of Jefferson wanting to play football when he learned during a chemistry class that women only wanted to date football players.

5.   He too uses poetry in his chemistry classes.

6.   I sat in on a Bosnian chemistry class.

7.   I never had a chemistry class or was interested in it, but they trained me to make Geiger counters.

8.   It went off one day in a chemistry class, blowing out two windows and inflicting temporary hearing damage on a girl.

9.   Mild but startling explosions caused by ammonia-moistened iodine crystals scattered around lab benches enlivened many a chemistry class.

10.   My chemistry class poured out of the building.