How to store LEGO in the classroom?

I often get asked what is the best way to store LEGO in a classroom environment. Jim's recent post is an excellent solution for the majority of people but may not suit a classroom, which often involves many kits and must be easy to secure / transport around various classrooms.
As part of the LEGO engineering mailing list, we asked the question "How do you store your LEGO kits?" and got a wide range of answers from teachers all over the world. I've collected all the different responses and turned it into a pdf that you can download from here - www.domabotics.com
If you are a teacher using robots in your classroom, how do you store your LEGO?

Edit: Dave Parker has another excellent method: "I use 12 gallon storage tubs with the built-in hinged lids, which are sturdy and stack well on the floor, or in a car/truck. For holding parts, these can hold two of the LEGO Education boxes (e.g. 9797 + 9648), each of which has the two sorting trays. Or for student kits and in-progress projects, they can hold one LEGO Ed box on the bottom with plenty of room on top for the robot and partially assembled stuff still protected inside the tub."
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Damien Kee
Comments
For holding parts, these can hold two of the LEGO Education boxes (e.g. 9797 + 9648), each of which has the two sorting trays. Or for student kits and in-progress projects, they can hold one LEGO Ed box on the bottom with plenty of room on top for the robot and partially assembled stuff still protected inside the tub.
damo
Such a setup can easily be expanded to additional parts, particular sub sets to take along (to events, e.g.) can be assembled, and all parts are stored in boxes with covers, so they can't fall out (very important factor).
I remember that Tufts University's Center for Engineering Education Outreach had a survey on this topic a few years ago.
http://www.legoengineering.com/browse-all-news-submenunews-65/24-building-a-programming/76-thinking-outside-the-box-a-look-into-lego-organization-and-sorting.html
Spacedude