Welcome to the Chemistry Problem-Based Learning (PBL) site hosted by the University of Toronto Mississauga (UTM).  This site is made possible by a Learning and Education Advancement Impact Grant from the University of Toronto.  It features PBL projects designed by UTM students participating in the Research Opportunity Program and CPS401 - Research and Development in Science Education.  The projects are intended for students in Grades 11 and 12 as well as those in first-year university. Problems with an experimental component have been indicated on their respective pages by (EXP). Additional notes and suggested solutions to the problems are available to instructors upon request to judith.poe@utoronto.ca .  We welcome your feedback on these materials.