The German word for “to show” is not schauen (“to look”), although they sound similar and are, in fact, related. The actual term for “to show” is zeigen.
The index finger is called Zeigefinger (lit. “showing finger”) in German, and the hands on a clock are called Uhrzeiger, from which we also get im Uhrzeigersinn (“clockwise”) and gegen den Uhrzeigersinn (“counterclockwise”).
The actual noun for “show” (as in, a radio or television program) is also Show in German, but more classically Vorführung or Vorstellung (“performance” or “presentation”) and very rarely Schau.
Hey. My name's Stephan. I wrote this blog post. What I also did: I filmed myself teaching German to some absolute beginners! See how that went...
Examples
Zeig mir was du kannst. Show me what you can do.
Können Sie es mir zeigen? Can you show it to me? or also Can you show me how to do it?
Ich muss dir unbedingt diese Vorführung zeigen. I absolutely have to show you this show.