11.   Dance and aerobics classes are a useful tool for encouraging girls back to school P.E. lessons.

12.   From a Marxist view, a class is a social group whose members share the same relationship to the means of production.

13.   From this point of view the professional-managerial class are likely to try to maintain their position by forming themselves into professions.

14.   He played classical guitar, and our music class was one of the most enjoyable hours for me.

15.   His upbringing, education and training had been based on the assumption that in any situation his class were the natural leaders.

16.   However, there is a class of data management systems where all operations are initiated by simple commands.

17.   What class were you in?

18.   My worst class was math, and every time we took a test, I was certain I had completely flunked it.