Navigation auf uzh.ch
in English: I've been at university for four years and have rarely taken part in the exercises so far, as they haven't been of much use to me or I've cancelled the exercise after two lectures and continued practising on my own at home instead. However, I found Mr Loacker's exercises really good, as they were relevant to the exam and related directly to the exam material, without unnecessary digressions and overly long explanations.