Hey willywang this is good but I have a few suggestions for you:

A useful website

I visited a website called "TED" last month. http://www.ted.com/
There, I found are many interesting speeches and academic lectures. I have learned was able to learn some advanced knowledge in many kinds of area a number of advanced topics I had never really known touch before.

That is a tricky sentence. While what you wrote is understandable, there's some incorrectly used context and colloquial phrasing. 

Otherwise In addition, I believe I can improve my English listening and speaking of English skills can be improve by from these videos on TED. It is very I feel quite lucky that I to have found this website because the website it is very useful for me and other people who want to practice English.