Open Middle
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Johnson, Nanette; and Kaplinsky, Robert  
"Open middle" problems, hints, and answers, all aligned to the Common Core State Standards (CCSS). Introduced by Dan Meyer, these kinds of math challenges have a "closed beginning," meaning that they all start with the same initial problem; a "closed end," meaning that they all end with the same answer; but an "open middle," meaning that there are multiple ways to approach and ultimately solve the problem.  


Levels:  Elementary, Middle School (68), High School (912) 
Languages:  English 
Resource Types:  Problems/Puzzles 
Math Topics:  Basic Algebra, Arithmetic/Early Math, Euclidean Plane Geometry, PreCalculus, Data Analysis, Probability, Statistics 
Math Ed Topics:  Common Core 
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