A good problem is something you don't know how to solve. That's what makes it a good puzzle and a good opportunity.
Paul LockhartDoing mathematics should always mean finding patterns and crafting beautiful and meaningful explanations.
Paul LockhartNo mathematician in the world would bother making these senseless distinctions: 2 1/2 is a "mixed number " while 5/2 is an "improper fraction." They're EQUAL for crying out loud. They are the exact same numbers and have the exact same properties. Who uses such words outside of fourth grade?
Paul Lockhart