The brain has several types of memory systems. One type follows four stages of processing: encoding, storing, retrieving, and forgetting.
Hermann Ebbinghaus was born in 1850, he was famous for discovering that people usually forget 90 percent of what they learn in class within 30 days. He also showed that most of this forgetting happens in the first few hours after class. This has robustly been confirmed in modern times.
An experiment was done with a group of students where they read a 32-paragraph paper about a fictitious foreign country. The introductory paragraphs were highly structured and contained either no examples, one examples, or more than one. The examples improved learning.
Examples helps us better encode information, because it
A professor who wanted to depict how art films depict emotional vulnerability went started his lecture by taking off his clothes. He had gym clothes underneath, but the behavior was memorable – it proved his point. This useful to remember for business and education.
Repeat to remember.
You can improve your odds of remembering if you reproduce the environment which you first put the information into your brain.