I have found a wonderful way to file all my papers. It really cuts down on time and desk clutter and anybody can do it. Assign each subject a color. For example, red for reading, yellow for math, green for science, etc. Buy (I hate that word too, but they are not expensive), or get a parent to donate, file folders of each color for each subject. I started out with at least 5 of each color. Then file and label the various topics for each subject in the corresponding color. This way if you need a worksheet on clocks, you know that all the math files are yellow and you go to the yellow folder labled time. If you need a reading comprehension test sheet, you would look in the red folder labled comprehension tests. It is also an ideal system to use for memos from the office and order forms from various companies. I hope it works for you as well as it has for me!