CEFR equivalence Challenges 4 covers virtually all descriptors at higher and lower Threshold (B.1.1 and B.1.2). For a full breakdown of the CEFR descriptors covered in Challenges 4 see www.longman.com/challenges/pdfs/cef/cef-level4.pdf General theme In this level the theme of challenge is present in such topics as getting involved in voluntary work, the Olympic Games, overcoming a disadvantaged childhood (Waris Dirie), and saving energy and indeed the planet! In this level the characters set up their own online radio station. They have to find, prepare and broadcast local news, and report on local events.