# Open Middle

# What's Open Middle?

### Each problem has multiple ways of solving, and sometimes, multiple answers. The often puzzle-like questions lend themselves well to collaboration and discussions of reasoning and mathematical thinking, perseverance, and creativity.

### Students complete several interations of a problem while building mathematical understanding, identifying misconceptions, and ultimately, developing a greater depth of mathematical knowledge.

### As an added teacher move, educators can prompt students to reflect on each attempt: What did you learn from this try? How will your strategy change on your next try?

### Sample Problems:

### Use the digits 1 to 9, at most one time each...

# More Information

### Find these problems and prompts at openmiddle.com.

### In this post, the creators of Open Middle, Robert Kaplinsky and Nanette Johnson, explain the structure of these problems.

### Along with the K-12 Math Task Collection with selected Open Middle questions linked to SK outcomes, here are other resources:

Use the search field on the Open Middle website to find alternate problems

Borrow the book

*Open Middle: Problems that Unlock Student Thinking*(Robert Kaplinsky) from the board officeOpen Middle worksheets are available on the site for tracking student thinking (English and French)