The document discusses contributing to open source projects. It begins by asking participants about their experience with coding and git. It then lists many ways one can contribute such as documentation, bug reports, reviews, development, and translations. The rest of the document outlines an activity where participants are split into groups to collaboratively develop a calculator application implementing various math functions over multiple tasks. It provides guidance on development practices like coding style, testing, and using git. It concludes by discussing the open source development process and encouraging participants to get involved in a project.