today in class(going over our test)

Today in Human Geography class we got out tests back and i did great on it , with and 88%. Today we went over out test and everybody answered questions. there was one question and it was what is the rate of natural increase of the world. nobody could figure it out. zach was the only one to answer it and he got a smarty. the answer was zero. we went over the test so we know what we need to do for the next test unless you got a 100% like jeffy. thats what we did in class today.