Since its launch in the fall of 2008, the Problem Based Learning for College Physics site has attracted a lot of users. As of today, 5266 teachers from 95 countries are using PBL with their students.         The purpose of this site is to provide college instructors with high-quality, field-tested Problem-Based Learning (PBL) activities. Possibly the greatest drawback of PBL is the difficulty in finding or creating good problems. Each activity presented here has already been used within Quebec College classrooms. Instructors may be interested in using the approach, but lack the time to develop thorough context-rich problems. This site therefore presents a sampling of PBL problems that can be readily used by interested instructors. Any and all feedback concerning problems presented here is welcomed and encouraged. To assure the viability of this site, a continuous supply of problems is needed. Instructors interested in contributing PBL problems to the community are strongly encouraged to do so through this site in the section Submit a Problem. Although we have started with PBL problems in physics (as the initial group of interested instructors shared this content-field), we are open to problems from all disciplines. The sincere hope is that this site will be a central resource in planning meaningful college classroom activities. Given the continuous user-contributor interactions, this site is to be viewed as a work in progress.         Materials presented on the site are designed primarily for teachers and students within the Québec college system, but they may be of interest to other clients. Materials may be reproduced without authorization unless otherwise stated (in the conditions of sale) for non-commercial use only. The source (Collegial Centre for Educational Materials Development) and Web site address (www.ccdmd.qc.ca) must always be mentioned. For commercial use, please contact us.         Content Development Primary Author and Content Editor: Nathaniel Lasry, PhD (John Abbott College) Content Advisor: Bruce Tracy (John Abbott College), Martin Courchesne (Cégep régional de Lanaudière à Joliette) Content Contributors: Camil Cyr (Maisonneuve College), Chrisian Héon (Victoriaville College), Caroline Viger, Nanouk Paré (John Abbott College), Olivier Tardif-Paradis (Cégep Garneau), Mathieu Riopel (Cégep Garneau) Development of demonstrations: Mathieu Riopel, Olivier Tardif-Paradis, Denis Nadeau (Centre de démonstration en sciences physiques) Editing: Veronica Schami English Translation: Wendi Petersen Website Development Graphic Design: Sophie Paquette Software Design and Programming: Robert Daniel Szczech Project Managers Nick Birks (CCDMD) Véronica Gill (CCDMD) Michel Hardy-Vallée (CCDMD) © Collegial Centre for Educational Materials Development, 2025