This is a good paper describing the use and characteristics of rich problems. http://math.sfsu.edu/hsu/papers/HsuKyshResek-RichProblems.pdf (The teaching method here is Teaching With Tasks.) Has 3 examples of rich problems First is rich and fairly basic and doable. Second is excellent. #differenceofsquares (I like this one the best. 😀) Third is quite open-ended. The article does a …