They 'modeled' their educational system 'on' the U.S. system. [=they used the U.S. system as a model when they created their educational system]
His best dish is closely 'modeled on' his mother's recipe. [=is based on and very similar to his mother's recipe]
She 'models' [=she works as a fashion model] for the world's most successful modeling agency.
(..) Okay. We better go warn Mark. SCARLET: You really care about him, don't you? - Yeah. - That's nice. That's really nice. He really needs a male role model. - He's a great kid. - Mm-hm. You know, they both are. I think you're a great mother. Thank you. (..)2009 17 Again