Green Teacher has just announce six FREE professional development webinars for September and October (2012). Please find details below. You can sign up for these sessions, and find more information on the presenters, at http://www.greenteacher.com/webinars.html.
In case you miss the webinar, archived recordings of all of webinars are available on the Green Teacher website. (Archives are available free of charge to anyone for one month following each webinar, and are thereafter available to Green Teacher subscribers.)