Business class vs. first class: The key differences Now that you know what business and first classes entail, let’s discuss the differences between the two options.

Within academia, however, discussion of class may be growing again, says retired Roosevelt University professor Jack Metzgar, author of a great book about working class life, Striking Steel.

During his 10 years in the classroom, his smallest class had 29 students, his largest 35. "I didn't notice that much of a difference, to be honest," he said.