I have site on J3.2 and i am looking for K2 article slideshow similar like www.madden-school.com. The slideshow/article showcase is below on menu. I would appreciate if someone can tell me specific extension for K2 article , same as on madden-school site?

or is it possible in K2 content module?

If you have the required module you can override the K2 Content module to have this look and feel.