There are a couple of ways you can search to see if there is a state law that addresses a certain topic.
The first option is to go directly to the Wisconsin Statutes.
What the heck are the statutes?:
"The Wisconsin Statutes are a compilation of the general laws of the state of Wisconsin currently in effect that have been given statute section numbers by legislation or supreme court order. The statutes on this web site are regularly updated to include legislation adopted during each legislative session." WI Statutes Help
You can browse the Statutes' Table of Contents or use the search box on the top of the screen to search for laws on your topic.
Another option is to do a Google search for your topic. Type in your topic and add wisconsin statutes site:.gov to the search:
For example, if you wanted to find Wisconsin laws on bullying, Google bullying wisconsin statutes site:.gov