FOSTER Plus developed a set of ten free online courses covering key topics of Open Science. Each course takes about one hour to complete and a badge is awarded after successful completion. You will need to create a free account on the FOSTER portal if you wish to claim your badge but the courses can also be accessed without registration if no badge is desired. The order you take the courses in is not important, the system tracks your progress regardless and you can claim the badge as soon you completed each of the suggested courses. However, we recommend starting with “What is Open Science?” as an introduction. The draft courses were released for public consultation during the summer and have been refined based on community feedback.