I guess I am an "old school" teacher too because this is what I teach as well.
As an "old school" English teacher I teach my students to use one less comma than the number of items in a series (i.e. a series of three items needs two commas). However, I also tell them that this is MY preference, and they will frequently see the final comma omitted as it is sometimes considered optional. I explain it this way: It's always correct to insert the final comma, but it is sometimes incorrect to leave it out. Why risk it?
These are good examples, Donna. I have seen varainces in the rule for commas in a series. Which do you employ?
Very Good examples, Diana. Which do you use more of in your classes. open or closed questions?
Closed: What are three behavioral characteristics of a successful salesperson?
Open: If a salesperson shows empathy toward a customer, conducts business with integrity, and has a drive for success, how will his/her sales be affected?
What is the rule for the use of commas in a series? Why is proper punctuation important for communication?
Closed: What are the three functions of religion?
Open: Explain why religion is impoirtant to society?
