We encourage everyone to share ideas and resources (lessons, tasks, 3-Acts, FALs, sample student work, websites, etc.) that you have created or found that may be helpful to Geometry teachers. Use the EDIT tab above to post resources. The discussion area at the bottom of the page can be used to discuss or inquire about posted resources, or to request resources from fellow Geometry teachers.

If you have questions on how to post resources or start a discussion, please contact me Brooke Kline for assistance.

Standards for Mathematical Practice...for Teachers

Volume of a cone & cylinder 3-Act Task

Open Middle Problems/Tasks for all grade levels -


Marbleslide Madness! (Standards for Mathematical Practice in action) - https://www.youtube.com/watch?v=gZ3eV6v9Ij8

Excellent video of Georgia students engaged in all of the SMPs. The students are part of an Algebra I class at North Hall Middle School in Hall County, Georgia. This video was part of Dan Meyer's blog post //Marbleslide Madness//; a post which called attention to the new Desmos Marbleslide activity.

A few other sites which show the SMPs in action are:
Inside Mathematics: Mathematical Practice Standards - http://www.insidemathematics.org/common-core-resources/mathematical-practice-standards
Illustrative Mathematics: Practice Standards - https://www.illustrativemathematics.org/practice-standards
Teaching Channel: Mathematics Videos - https://www.teachingchannel.org/videos?page=1&categories=subjects_math&load=1

Formative Assessment PLUS Practice Activity

Great Classroom Projects & Assessment Tasks at http://www.bowlandmaths.org.uk/index.html

Inquiry based units for Algebra, Geometry, and Algebra II

A Google form for math teachers

The Need for Change - Classroom Structure: Homework