I have an 18x24'ish clear tote that will be the limit of what I am keeping for each child. During the school year, I keep it all in a large bag down in the laundry room and then in the summer I go through it and keep the best. I often keep samples from the beginning of the year/end of the year to show progress, and anything arty with more detail or sentiment. In the earlier grades I would keep anything with handprints and such too. Now that the kids are going into grades 2 and 4 (eek!), I tend to keep more stories and journals. We make calendars for the grandmas each Christmas that showcases the kids' artwork, so I try to save smaller pieces that are 81/2 x 11 for that. This year my daughter came home with a million worksheets, and I got a little more picky about keeping things, and automatically recycled anything but the best. I used to keep absolutely everything, but yes, after a few years you have to make some difficult decisions.... unless of course you have unlimited storage and can keep a tote for each year! I try to think of what I/my child what like to look at 20 years down the road, and go from there!