"Upstream Proficiency" is a modular secondary-level course for learners of the English language at CEF C2 level. The series combines active English learning with a variety of lively topics presented in themed units. Key Features theme-based units from a wide variety of authentic sources in five modules, a variety of cross-cultural topics, systematic development of all four language skills through realistic challenging tasks which encourage the learner`s personal engagement, lexical exercises practicing and activating all essential vocabulary including collocations, idioms, phrasal verbs, fixed phrases and word formation, a varied range of reading texts from authentic contemporary sources, with exercises which encourage learners to read extensively as well as intensively, stimulating reading and listening tasks, a wide range of speaking activities, writing analysis