are there any nice web sites for practicing dictation in Japanese?
I imagine sites where: Sound of short Japanese conversation or a link to such material is uploaded, each participating learner listens to it, write it down literally, and puts the result into the site, then the participants compare and discuss their results, and repeat this activity regularly -- weekly or twice a week -- free of charge.
Background: I help foreign people learn Japanese once a week in Japan. Some of them find difficulty in listening even though they live in Japan. I'd like to recommend nice sites for them to improve listening comprehension by practicing dictation a few times between classes. I searched Google but couldn't find this kind of sites.
I will appreciate your help.