Melissa Telling, a friend, fellow homeschooler and creator of many wonderful products (Lilliput Station) wrote an excellent article about copyrighted material. I completely agree with every wonderful word she wrote. I believe this is a must read for all homeschoolers and an excellent reminder that "free" doesn't always mean "free". Great job, Melissa!
There's No Such Thing As A Free Lunch
Here's a You Tube video that goes along well with this topic as well.
Homeschool Copyright Awareness