Is this how you say "what do you know ?"in japanese?

"what do you know" in Japanese is:

何を知っていますか?

nani wo shitte imasu ka?

More politely:

何をご存知ですか?

nani wo gozonji desu ka?

composition:

何(nani) = what

知っている(shitteiru) = know

ご存知(gozonji) = polite expression of 知っている(shitteiru)

Hi, I am seeking to hooked up a organization for persons who're taken with finding out Japanese. Not a lot success thus far. I talk just a little. But, to a few persons it appears like plenty. But, it isn't. I taught it at university after which I taught English to Japanese. I have a organization website already however I have not performed something there but so... I want persons to gain knowledge of Japanese.

いかに知っているか sorry i cant type it in japanese