Here's everything you need for powerful professional development in one place: "The Fostering Geometric Thinking Toolkit." Based on the popular "Fostering Geometric Thinking, "the "Toolkit"'s 20 two-hour sessions provide a year's worth of math PD for middle and secondary teachers. Its facilitator- and participant-friendly sessions cover the key topics of "Fostering Geometric Thinking": geometric properties, transformations, and measurement. With "The Fostering Geometric Thinking Toolkit, "you'll lead teachers through hands-on opportunities to: develop new understandings of middle and secondary students' geometric thinking through a field-tested geometric habits-of-mind framework broaden and express their own geometric thinking by solving rich problems observe students' thinking and problem solving through in-the-classroom footage practice analyzing student work apply all they've learned in the sessions to engage students' thinking more effectively. "The Fostering Geometric Thinking Toolkit" fully supports you. Its facilitator materials provide clear instructions and include agendas, facilitator notes and tips, and other helpful resources. Its accompanying DVD goes above and beyond with an array of essential tools, including: numerous video clips for use in the sessions PowerPoint slideshows that summarize existing research on students' geometric thinking printer-ready participant handouts geometry applets for use by both participants and their students. Use "The Fostering Geometric Thinking Toolkit" and help your participants discover powerful ways to lead students to a new understanding of geometry.