I've got (5) steps coming out of a house. In the past, common practice has been to frame and pour it as one solid cube of concrete with a footer under it. I have seen another mason form it up after pouring the footer and then fill a lot of it with gravel to reduce the amount of concrete needed. I have also seen mason's using block in combination with gravel prior to concrete. On one job I worked on we did the concrete block. Used them as our form and filled them solid with concrete. Next day filled with gravel and left if for 6" thick of concrete once poured to finish the steps. This was all later covered with stone. What is your practice and why?