Playing With Pearltrees - A Great Way to Organize the Web. Last night I was exploring Pearltrees again when I came across a Pearltree titled Free Technology for Teachers. While the name is the same as my blog, I did not have anything to do with creating that particular Pearltree. That said, many of the resources cataloged in the Free Technology for Teachers Pearltree are excellent resources that I have used and or written about here in the past. If you're looking for a good visual collection of technology resources, take a look at the Pearltree embedded below.