This is a copy of About Khan academy. Here is Japanese translation.
A free world-class education for anyone anywhere.
Khan Academy is an organization on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.
All of the site's resources are available to anyone. It doesn't matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get a leg up in earthly biology. Khan Academy's materials and resources are available to you completely free of charge.
Will you join us? We are working on Khan academy internationalization project.
There are a lot of problems in this world: poverty, energy, disease, pollution, social inequality, global warming, and so forth. One thing is clear to me: without this world, nobody can survive. It doesn't matter if you are rich or poor, clever or not, strong or not, we cannot survive without the world. To avoid our extinction, I believe we need every brain in the world to solve these problems. In this sense, racism is suicide of human being to me. We don't know who comes up with a solution for the energy problem. We don't know who finds the cure for cancer or diabetes. Therefore I believe free learning material for everyone is necessary.
If you see the same vision, join us. But, this is NOT THE solution, this is just A possible solution. There are many way you can contribute to the world. The world means the place of you, your family and children, your friends to live. It will be a long way, but I believe this is worth to do.
Note: English subtitles are also needed for hearing impairment learners.
For both interactive method and batch method first need to choose a video which you want to translate
The interactive translation method is a method to use the amara's web interface. You can translate the video one sentence by one sentence. This is rather for beginners. You need the internet connection while you translate a video.
By the batch translation & Upload method, a translator can use their favorite tools (e.g., editor), then uploads the translated result file. This is independent from the amara tools, also internet connection is not needed during the translation task. Since I can concentrate translation task itself, I prefer this method. I sometimes translate a file while on a train or on a plane. Only when I upload the file, I need a internet connection.
The following links have tips for video dub.