Susan Loucks-Horsley was the lead author of the first edition of Designing Professional Development for Teachers of Science and Mathematics and directed the professional development research for the National Institute for Science Education on which the book is based. At the time of her passing in 2000, Susan was the associate executive director of Biological Sciences and Curriculum Study (BSCS) and senior research associate for science and mathematics at WestEd. She had previously served as director of professional development and outreach at the National Research Council s Center for Science,...