The school's ANPA bought fifteen CO2 meters for the center to place in classrooms and common spaces with the purpose of checking the levels of that gas in the environment and thus knowing if the air is very charged and needs to be ventilated or if, on the contrary, it is at a level optimal These are devices that display a number that indicates how much CO2 there is in the classroom, indicating with the green color if the level is good, with the yellow color if it is acceptable and with the red color if the air needs to be renewed, so it is very easy to have the class in good conditions to avoid possible contagion by aerosols of CoVid-19.