This document discusses using project-based learning and Arduino for educational projects. It defines project-based learning as a student-centered approach where students investigate real-world problems and develop critical thinking skills. Key elements of project-based learning include defining challenging problems, sustained inquiry, student voice and choice, and presenting work publicly. The document also introduces Internet of Things and how Arduino can be used for educational projects involving measuring temperature, light, or creating digital postcards. Sample projects are proposed involving these topics. Teachers are encouraged to use eTwinning platforms to facilitate student collaboration and sharing of project outcomes.