The document discusses project-based learning (PBL) and its use in eTwinning projects. It describes PBL as an inquiry-based teaching method that engages students in solving complex, real-world problems. The document outlines the essential elements of PBL, including defining challenging problems, sustained inquiry, authenticity, student voice, and creating public products. It then provides an example workshop that walks groups of students through a sample PBL project on topics like water pollution, computer networks, and history. The document emphasizes that PBL allows students to learn by doing and that eTwinning and web tools can support students collaborating on international PBL projects.