I used a tool recently which counts the number of words I've posted on my blog. I've written a total of 339,254 words on my blog (as posts and comments), and other people have written a total of 111,474 words as comments on my posts.
This level of engagement and thinking has got to make a difference on my understanding of education, and at least indirectly on my skill as a teacher. When I say that blogging has made me a better teacher, I mean it.
David is a Formative Assessment Specialist for Mathematics at New Visions for Public Schools in NYC. He has been teaching since 2002, and has worked in Brooklyn, London, Bangkok, and Vancouver before moving back to the United States. He has his Masters degree in Educational Technology from UBC, and is the co-author of a mathematics textbook. He has been published in ISTE's Leading and Learning, Educational Technology Solutions, The Software Developers Journal, The Bangkok Post and Edutopia. He blogs with the Cooperative Catalyst, and is the Assessment group facilitator for Edutopia. He has also helped organize the first Edcamp in Canada, and TEDxKIDS@BC.