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 Ted Coe on Transformations and triangle congruence and similarity criteria
 Essays from the NoyceDana project: clarifying the mathematical underpinnings of secondary school  hsmathematicstothecore on Essays from the NoyceDana project: clarifying the mathematical underpinnings of secondary school
 Yesterday’s post on the NoyceDana essays  Tools for the Common Core Standards on Essays from the NoyceDana project: clarifying the mathematical underpinnings of secondary school
 Bill McCallum on New Draft of NBT Progression
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Geometry Progression Grades 7 to High School
It’s been a while coming, but here is the draft Geometry Progression for Grades 7 to High School. As usual, please make comments and corrections in the relevant forum.
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Transformations and triangle congruence and similarity criteria
While we are all waiting eagerly for the geometry progression I thought people might be interested in this article by Henri Picciotto and Lew Douglas on a transformational approach to the criteria for triangle congruence and similarity. There is also … Continue reading
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Yesterday’s post on the NoyceDana essays
I don’t think the normal notifications went out about this, so I’m adding this to let people know about the collection of essays about secondary mathematics that I posted yesterday.
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Essays from the NoyceDana project: clarifying the mathematical underpinnings of secondary school
In 2008–2009 Dick Stanley and Phil Daro, with the help of Vinci Daro and Carmen Petrick, convened a group of mathematicians and educators to write essays clarifying the mathematical underpinnings of secondary school mathematics in the United States. At the … Continue reading
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Having trouble posting comments?
Some people are getting a message that comments have been closed if they try to post a comment on a post. I don’t generally close comments, so this is an error. I haven’t figured out how to fix it, but … Continue reading
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The confusion over Appendix A
A number of people have gotten in touch with me recently about Appendix A, so I wanted to clarify something about its role. States who adopted the standards did not thereby adopt Appendix A. The high school standards were intentionally … Continue reading
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New Draft of NBT Progression
Here the almost final draft of the Progression on Number and Operations in Base Ten, K–5. It incorporates many changes in response to comments here on this blog and elsewhere. In addition to numerous small edits and corrections, and some … Continue reading
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New Illustrative Mathematics website, with K–5 blueprints
Illustrative Mathematics has a new look today. There’s a video explaining some of the new features on the Illustrative Mathematics Facebook page. One big new feature is the course blueprints. At the moment we just have K–5 blueprints. We’ll be … Continue reading
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Learning about the standards writing process from NGA news releases. Take 2.
About a year ago I noticed there was a lot of misinformation being spread about the process for writing the standards, so I came up with the brilliant idea of pointing people to the historical source documents that chronicled the … Continue reading
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Drawings in the Common Core
There’s been a lot of talk recently about the Common Core and drawings. I won’t get into the politics of that here—that’s for my other blog—but, politics aside, there is an important question of interpretation, and possible misinterpretation, of the … Continue reading
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