Students in IS I are studying soils as part of their Big Grow 2014 and needed a clear way to understand porosity and permeability. I dusted off this lab that we have not done in over 10 years (when we used to teach Earth and Space Science and did a groundwater unit). I still use the columns for a beach sand lab where students determine settling velocity. Sometimes there are classic experiences in the classroom and this is one of them. I meant to take photos of the students but they had such trouble with the simple directions that I was putting out fires all period. I decided we will repeat the lab tomorrow to see if the results are different/more reliable.