Welcome to our online course! With each video, you can learn about one scientific topic useful to CERN scientists and engineers in 20 to 30 minutes. This course is freely accessible to everyone, conducted in English, and will grow as we publish more new videos. In each video, you have the opportunity to test your understanding by answering dedicated quiz questions. If you are at least 16 years old, you can enrol in the online course of the CERN-Solvay Education Programme to obtain a digital certificate which attests of your successful participation. In turn, with this certificate, you will be able to apply for one of the CERN-Solvay student camps.