Thread:Project:Support desk/Add a collapsible sidebar (2)

I would like to add a collapsible sidebar to my Wikipedia page much like the one found on the right of the Wikipedia page for Quantum Mechanics. Unfortunately, it seems as if this would require quite a few templates if done similarly to the Wikipedia version. I'm new to Wiki editing and don't know much about templates. Is there a relatively easy way to add a sidebar to the page, either by using a template or by some other means?