"Upstream: Proficiency" is a modular secondary-level course for learners of the English language at Proficiency 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 practising 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...