This website is a project of UCLA and the Carnegie Foundation for the Advancement of Teaching. Funding for the site was provided by a grant from the William and Flora Hewlett Foundation and by the Gabriella and Paul Rosenbaum Foundation. The purpose of the site is to make available to the public the 53 public use video lessons that were collected as part of the TIMSS video studies. On the site you will find not only the 53 videos, but also translations of the videos into English, linked by time codes to the videos, and various resources that accompany the videos such as textbook pages and teacher commentaries. The site is intended for use by education researchers, teachers, administrators: in short, anyone interested in exploring the teaching practices of different countries.