RSS is an SOS

Using the Google Reader RSS has been a good experience. It is becoming as second nature as it is to check email. I like a point Pam refers to in a blog post about knowing where to find knowledge. The RSS is certainly one method to navigate your way to knowledge. One question I have is about number. Do most of the free sources allow high enough numbers for whole classes/schools to assign each student their own? One issue that keeps coming to my mind is security. There are probably many posts/websites out there that I wouldn’t want my fourth graders to read. I would think the same applies to high school. How can you monitor/screen what students are seeing?