There's very little legal precedent on the topic, though several court challenges are now working through the system. (nashvillepublicradio.org)
They receive homework assignments and upload completed work through the system. (slaw.ca)
After working through a system of squishy pads and other alternatives, Hawkes turned to nitinol, which has the unusual property of growing stretchier as the force pulling it increases. (sciencenews.org)