The baccalauréat, often known in France colloquially as le bac, is an academic qualification which French and international students take at the end of the lycée (High School) (secondary education). It is the main diploma required to pursue university studies.
Today French students had to pass the examination in physics and chemistry. In the first exercise the French students were calculating collisions at the LHC. Not only was the importance of Higgs boson discovery discussed but also the Beauty meson production inside the LHCb VErtex LOcator (VELO). The VELO detector is composed of two halves placed on both sides of proton beams around the proton-proton collision point. A VELO half is shown in the image.
If you understand French you can try to pass the French baccalauréat exam here.
click the image for higher resolution