metaphor

can you give me an example and explanation of metaphor according to the hidden curriculum. Thank you very much.

[RonBee]

A metaphor is a figure of speech. It compares one thing to another as a way of describing something. An example is "Joan is a mouse" meaning that Joan is timid. Another is "Richard is a lion" meaning that Richard is brave.

Could you explain what is meant by "hidden curriculum"?

• Metaphor
  http://www.usingenglish.com/glossary/metaphor.html

:)