Heres everything you need for powerful professional development in one place: The Fostering Geometric Thinking Toolkit. Based on the popular Fostering Geometric Thinking, the Toolkits 20 two-hour sessions provide a years 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, youll 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 theyve learned in the sessions to engage students thinking more effectively.

• 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.

Mark Driscoll is a nationally recognized leader in mathematics education who designs instructional resources and professional development materials that build mathematics teachers' capacity to enhance students' understanding and improve their learning outcomes. He is the author of Mathematical Thinking and Communication (2016), Fostering Geometric Thinking (2007), Fostering Algebraic Thinking (1999), as well as The Fostering Geometric Thinking Toolkit (2008) - all published by Heinemann. Mark is the Managing Project Director of Leadership for Learning Innovation at Educational Development Center (EDC) in Waltham, MA. He received his Ph.D. in mathematics (differential geometry) from Washington University in St. Louis and taught mathematics at Logos School, an alternative high school in inner-city St. Louis. He has been a member of the writing team for NCTM's Assessment Standards for School Mathematics and served as Editor of Mathematics Education Leadership, the journal of the National Council of Supervisors of Mathematics, from 2003 - 2007. Mark has been named the recipient of the Ross Taylor/Glenn Gilbert National Leadership Award from the National Council of Supervisors of Mathematics (NCSM). The award recognizes Mark's contributions to mathematics education over four decades as well as his work at EDC.

Rachel Wing DiMatteo is a coauthor of Fostering Geometric Thinking (2007) and its professional development companion, The Fostering Geometric Thinking Toolkit (2008), both published by Heinemann.Shestudied the development of mathematical knowledge while pursuing her Ph.D. in Psychology (cognitive development). Since then Rachel has been involved in the creation of professional development materials that help teachers understand the development of mathematical knowledge in their students.

Johannah Nikula is a coauthor of a number of Heinemann professional development books and staff development materials. Her most recent are Lesson Study in Practice: A Mathematics Staff Development Course (2010) and the companion, A Mathematics Leaders Guide to Lesson Study in Practice (2010). She also coauthored Fostering Geometric Thinking (2007) and its professional development companion, the Fostering Geometric Thinking Toolkit (2008), both published by Heinemann. Her work has focused on professional development for middle and high school mathematics teachers that is grounded in the work of teaching through analysis of artifacts that reveal students' mathematical thinking and through the Japanese lesson-study process.

Michael Egan is a coauthor of Fostering Geometric Thinking (2007) and its professional development companion The Fostering Geometric Thinking Toolkit (2008), both published by Heinemann.Hehas taught middle and high school mathematics since 1995. While he continues to teach adolescents on a part-time basis, his current work focuses on mathematics education research and teacher education.

June Mark brings over twenty years of experience in research and development related to mathematics instructional materials, curriculum implementation, and mathematics teacher professional development. June received her BS (Mathematics) and BSE from the University of Pennsylvania and her Ed.M. from the Harvard Graduate School of Education. She has been involved in a numerous mathematics education projects, many centering on bringing high quality mathematics to underserved populations. Outside of work, she enjoys spending time with her family including her kids, Michael and Lena. June Mark is the coauthor of four Heinemann titles: Lesson Study in Practice: A Mathematics Staff Development Course (2010), A Mathematics Leaders Guide to Lesson Study in Practice (2010), The Fostering Geometric Thinking Toolkit (2008), Choosing a Standards-Based Mathematics Curriculum (2000) and Transition to Algebra: Make Algebra Make Sense (2014).

Grace Kelemanik has more than 30 years of mathematics education experience. A frequent presenter at national conferences, her work focuses on urban education, special populations, and teacher training. She is a former urban high school mathematics teacher and Project Director at Education Development Center. Grace has also worked extensively with new and preservice teachers through the Boston Teacher Residency program. Most recently, Grace is the coauthor of Routines for Reasoning: Fostering the Mathematical Practices in All Students. She is also coauthor of The Fostering Geometric Thinking Toolkit. She is a mathematics education consultant and professional development provider. Follow Grace on Twitter @GraceKelemanik Watch Grace and her coauthor Amy Lucenta talk about the effectiveness of instructional routines.