We are are going to explain how to calculate volumes of solids of revolution.  Then we will illustrate the concept by solving some math problems on an interestingly challenging Calculus worksheet.

This one-time class will contain 35 mins of lecture time and then 10 mins of students' activities (worksheet problem solving).
My teaching style is start with explanation of the math concepts involved.  Afterwards, I will show on the virtual white board how to actually solve some past exam...