Or, a system of state tests in three grades could be given on top of a system of district tests given in three different grades. (educationnext.org)
But the basics — an inability to really get on top of system of organizing that works, or to maintain a system of neatness, or to keep on top of all the chores that need to be done — that's me. (askmoxie.org)
I was just sorting through my August photos in Lightroom, rating and labeling and organizing the images (I am a few weeks behind, but still staying on top of my system happily!). (soulemama.com)