Concept mapping is an diagram that helps one to  understand the hierarchy of the ideas from big to small in a particular subject . Concept mapping consists big shapes, small shapes with the big subjects to small ideas. Plus, it consist lines which represents the relationships to the shapes.   This is a very effective note-taking technique when reading a book.  Not only it’s easy to read , it’s easy to gather up important ideas from the map in an instant. This definitely will help readers to summarizes what the author taught them in the book. Comparing this to an ordinary linear notes, this seems to be the most useful note taking  method.