I've written before about the amazing ReadWorks.org website, and I have to share today that they've just added 100 new passages. As you can see above, these include fiction and original reporting, in addition to science and social studies. The passages are identified by grade level and lexile.
This fabulous site also provides Skill and Strategy Units, Novel Units, and so much more! I could go on and on, but I'd prefer that you check it out for yourself. I guarantee that you will find it hard to believe that all of this is FREE!