Teaching History is giving away a poster for teachers. This colorful Historical Thinking Poster illustrates use of primary and secondary sources as if you are solving a mystery. This poster also includes questions students should ask when reading primary source documents. Tips for locating reliable secondary sources are also included in the double-sided poster. There are sample questions students should ask when doing research done in a graphic design. Request your free poster here. Also look to the right side of the site to see some other great resources and links. Re-visit the home page of this site and see some great offerings including the above Weekly History Quiz.