So, why I am talking about picture walks? I think picture walks lead to better study skills. Why do I think that? Children who are 3, or 4, or 5, or 6 years old are too young to be worrying about study skills. Yes, I know you were thinking it.
Think about this: Children are more apt to learn and remember a skill/idea/routine if taught to do it from an early age. Also, the picture walk often gets the children excited about the book. And, when they are older, doing a preliminary "picture walk" or "purposeful browse" through the book will help in studying and note-taking.
In older grades, teachers will often tell students to take a "walk" through a chapter of a textbook. Look at all the pictures, diagrams, charts, headings, subheadings, and bold words. That will give you a good idea of the content in the chapter. If there is anything that you don't understand or difficult…sketch it, write it down, copy it. Do what you need to do to remember to pay special attention to it and to find your answers while reading the actual chapter.
It all boils down to this: I believe that children who are not shown how to picture walk and who aren't taught that picture walks are important will be less likely to feel the importance of pre-reading in later years.