By making a free account at TIMSS ( http://timssvideo.com/ ) you can view 53 videos of 8th-grade classes conducted in math and science from around the world. The lessons were videoed in 1999 as part of a study conducted by UCLA and the Carnegie Foundation for the Advancement of Teaching to compare US math and science classes with those found in high-achieving countries.
The math classes you can watch took place in Australia, the Czech Republic, Hong Kong, the Netherlands, Switzerland and the United States. Science classes were videoed in Australia, the Czech Republic, Japan, the Netherlands and the United States.
It might interest students to see students from around the US and in other countries learning the same things they are—or you may want to view these just for your own interest. All lessons show teachers and students working on specific lessons and are translated with subtitles. In addition, you can view the transcript of the lesson and click on it to go to that portion of the video; and you can download the resources (worksheets, etc.) attached to the lesson, though probably only the US (and sometimes Hong Kong) resources are useful, since the handouts and worksheets are written in the language of the country being filmed.