The Ecce Romani Level I teacher edition textbook is available at PearsonSchool.com. Online bookstores, such as BarnesAndNoble.com and Amazon.com, sometimes have copies of the Ecce Romani teacher edition in stock.
As of 2015, there are four editions of the Ecce Romani Level 1 textbook, and the most recent edition was published in 2009. Pearson School sells all editions of the textbook as well as additional teacher resources, a teacher handbook and an online teacher resource package.
Barnes and Noble and Amazon offer resale copies of Ecce Romani from third-party individuals or companies. Both companies sell used and new copies of the textbook, though not all editions are available for purchase.