The belief that knowledge is best acquired as a direct result of experience is called

The answer to this question is: empiricism
The ideas is derived in 17th to 18th century  by several famous economist such as John Locke.
the believe is started to become popular after Malcolm Gladwell's book the 10,000 hour rule, that indicates in order to become a world-class expert in doing something, we need to invest at lest 10,000 hours in doing that thing.

Write out a reference sheet. document your findings. use a presentation to show the findings. give a detailed outline to each individual.