Quiz's back and population pyramids

Today in class we got our Lost Boys quiz back. Our class had the lowest average grade. The other classes got a B as their average, and our class got a D as our average. I got an 80%. We went over the answers and then we reviewed population pyramids. We went over what we learned yesterday then we looked at different pyramids for different cities and observed what we saw. We looked at cities in New York, South Dakota, etc.