The CS club of my French engineering school organize sessions throughout the year to teach different subjects related to CS and the tools needed to make the most of classes at the school. Those sessions are open to everybody. I gave lectures of Web development, LaTeX and Git.
More information can be found at : https://github.com/KIClubinfo/formation-web (in French)
More information can be found at : https://github.com/KIClubinfo/formation-git (in French) Slides at: https://kiclubinfo.github.io/formation-git
More information can be found at : https://github.com/KIClubinfo/formation-latex (in French)