The idea of English for Mary course is to give people a chance to use English and do charity at the same time. Its goal is to create a friendly atmosphere where anybody can come to practise English. The course fee is up to everybody and 100% of it goes for charity, namely for Mary´s Meals. This is where the name of the course comes from. So it´s a fundraising activity where you pay what you want to get language education and thus you actually finance education for poor children all over the world.
For more information about Mary´s Meals see https://www.marysmeals.org.uk/ or https://marysmeals.cz/.