J.E.
Hi Kelly:
I have 2 girls and the same issue...to many school projects and no place to store them. :-)
I found a Keepsake Portfolio at the Lakeshore Learning Store (originally on line, but I also saw it in the store there in the Kohl's/Costco shopping center - I see you live in San Marcos, I'm in Escondido). It's a pretty cool little portfolio, it has separate pockets that you can label for the different years and store the projects from that school year.
I tried to post the link, however, for some reason it wouldn't post right. If you want to view it just type in Lakeshore Learning stores, and look for Art Portfolios.
Hope this helps. :-)
Tammy