This is a good reference to hang up for students for Genius Time/Passion Hour/20% Time (or whatever you call it). Sometimes you need to answer smaller, simpler questions before you come across quality researchable questions. I use the terminology inch, foot, & yard to help give a visual for my students.
INCH question: The answer is very short, and usually needs very little research.
FOOT question: The question requires some reading through the information you find to answer the question in your own words.
YARD question: This question requires some searching in a variety of sources, then combining the information you find, and drawing your own conclusions.