Hi there,
Some ideas:
− The rating system is esentially pointless as the words continue to pop up. Why not have a methord of partitioning them into 'got it' 'so so' etc so that the ones we continuly make mistakes on will be more frequent?
− Need to have a reading component so that the words are seen in context. I'm 100% that would improve peoples retention rates.
cheers,
p.s this is for the Japanese side of the site :)