"How do you write this character?"
I think so too. I would be interested to hear from a native speaker if it is not actually correct -- or at least not a common way of saying it.
It would be very helpful if I could click on the characters after I have answered wrong and hear what they are. I see the characters for the correct answer, but often I don't know what they are. And once I have answered wrong, clicking on the characters tells me nothing.
I can help you with Chinese if you can help me with my English. I'm from China.