Question

I am working on a project for school and I can't seem to find the year that these Chinese inventions were invented.

Yo-yo.
Compass.
Acupunture.
Wheelbarrow.
Printint.
Writeacher
http://en.wikipedia.org/wiki/Yo-yo

http://en.wikipedia.org/wiki/Compass

Keep using the search box at the left side of the screen in Wikipedia to search for the rest.