Certification
The following Institutions offer Chinese teacher certification in Wisconsin.

Beloit College
http://www.beloit.edu/education/

Lawrence University, Appleton
http://www.lawrence.edu/dept/education/certification/

University of Wisconsin-Madison
http://www.education.wisc.edu/ci/about/default.asp
Contact: Charles James, cjjames@wisc.edu

University of Wisconsin-Milwaukee
http://www4.uwm.edu/soe/departments/currins/eca/world_languages/index.cfm
Contact: Raquel Oxford, roxford@uwm.edu

Project Teaching, Ladysmith
(offers alternative certification through mostly online coursework)
http://www.projectteaching.com/projectteaching.aspx

You may also want to check with your local CESA. They have been known to offer certification programs in shortage areas as well.
Map of CESA locations
http://www.cesa1.k12.wi.us/, http://www.cesa2.k12.wi.us/, http://www.cesa3.k12.wi.us/, http://www.cesa4.k12.wi.us/
http://www.cesa5.k12.wi.us/, http://www.cesa6.k12.wi.us/, http://www.cesa7.k12.wi.us/, http://www.cesa8.k12.wi.us/
http://www.cesa9.k12.wi.us/, http://www.cesa10.k12.wi.us/, http://www.cesa11.k12.wi.us/, http://www.cesa12.k12.wi.us/