What are some US Mandarin curriculum standards? I'd like to start tutoring Mandarin through software I am writing. What are US domestic curriculum standards that I can base my teachings off of, starting at the middle- high-school level? 

Please provide links and an explanation for why you selected a particular one. I'm looking for a curriculum example, learning objectives, exercise samples, and evidence of learning examples.

For example, I'm thinking US AP (Advanced Placement) language curriculum would be a good starting point. 

If not, should I be using China's HSK?

I'm thinking AP because I'd eventually like to bring on more languages into my software and AP offers many language choices.
I am not familiar with AP Chinese curriculum but I would recommend go by China's HSK.

Reasons:


HSK is designed for non-native speakers and is administered by an agency of Ministry of Education.
If you adapted the HSK, you might lower your cost of authorisation. Even though I don't have the actual number, you could tell from the exam fees.
HSK is harder than AP Chinese. It's not easy to get 'A' in HSK.