Check out these student writing exemplars from the August 2011 Literacy Pre-Test (Download the show). If that file type doesn't work, you can access the PDF version (audio narration won't work in PDF).
Students, use these examples to improve your reading, thinking, and writing skills. Teachers, let students analyze the exemplars in class to see models of different levels of thinking and to make explicit the three components of a solid inference: 1) point (inference or conclusion, 2) textual evidence, 3) explanation.
We all learn from each other, reading and noticing how others think and write.