Wow.. a completely ignorant teacher. This clearly demonstrate problem faced by GNU/Linux in class room.
A teacher (from Austin, TX) came to students and confiscated the Linux Live CDs. Next, she wrote an angry email to HeliOS's project founder, Ken Starks:
After confiscating the disks I called a confrence with the student and that is how I came to discover you and your organization. Mr. Starks, I am sure you strongly believe in what you are doing but I cannot either support your efforts or allow them to happen in my classroom. At this point, I am not sure what you are doing is legal. No software is free and spreading that misconception is harmful. These children look up to adults for guidance and discipline. I will research this as time allows and I want to assure you, if you are doing anything illegal, I will pursue charges as the law allows. Mr. Starks, I along with many others tried Linux during college and I assure you, the claims you make are grossly over-stated and hinge on falsehoods. I admire your attempts in getting computers in the hands of disadvantaged people but putting linux on these machines is holding our kids back.
This is a world where Windows runs on virtually every computer and putting on a carnival show for an operating system is not helping these children at all. I am sure if you contacted Microsoft, they would be more than happy to supply you with copies of an older verison of Windows and that way, your computers would actually be of service to those receiving them
Read on ken's reply: Linux - Stop holding our kids back
Perhaps, some one need to educate the teacher and point out that Linux is being used by governments, private & public corporations, and millions of embedded home appliances are powered by Linux.
Update - Dec., 12 2008: This matter is now closed and the student did get back Linux CDs after the class.
Updated for accuracy!