What is hidden curriculum? give an example of something that might be part of educations hidden curriculum? will give a brainliest

Side effect of education such as negative or positive effects on the learners behaviors from the lesson taught.

One POSITIVE example being ; 

The children in a class are shown a video about drinking and driving;many of them know that its wrong to do so and will likely avoid drinking and driving to avoid getting in trouble with the law/have a chance of dying from a crash.

Idont understand this questio